thumb|300x300px|Brownstones in Harlem, Manhattan, New York City 300px|thumb|Biking among brownstones in Park Slope, Brooklyn Brownstone is a brown Triassic–Jurassic sandstone that was historically a p
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99771539e4a33b392b6e2336b48b4003d12af03f33c6251a7d13df489e87601a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4cdd447-2ef6-4059-a905-d5aeec2350f5.json and https://artists.proofprofile.net/proofs/artist/a4cdd447-2ef6-4059-a905-d5aeec2350f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c626d11c31f56af949be5900183c5f37a578d9796ed50f5b095a0bb9e05f410. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19402079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefa5291b2bea7b0d87f890cefe662bc4cac3e388df342338f20675399fb5198. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8114110d2ba572c8ecb14b7cf6663cfc6579a3728550adcbe64e13e7b64d40c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10020901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c953092a35850f332d983076fb6a52b418e22e3785628c26b840bbf33291189. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19402082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c9a3cc5ab8617180f3dd083b8c52a6476fd7be18a19423e5196ba41e8f5a4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10024916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f44793e862a34a8ce6f3f158d96d064f8a6f8580271642140db299ac7b3cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19402081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad667f658387d2dc5fbac8a100cdefe398ad181bb7cf7c395ef36def1624fe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM20401591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239be7b9ae7e2ed5569f8d10c3e4046d42b1971aa180ec9165644274b4f263da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM22000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc505a4cb955a9f173556e089f53076b8d66fcfa8e1b6e0271c2a178e89a5b148. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19402686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c929a8595e237de463096bac9de537bc55b7c73229d40e790df3a195031227. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2079f4d030a89d0959a6b7de3ab3b94a205c94fa1cb09792bae86717eb9480c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a28dcc50d7a175eea024a0ef3ac370327c4b731a7edb7e563566853c15efce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10413748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5ee9d6142a62b6887069f9a081622fedfb4f7f58d20edb37145c611938d496. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05de80e493cc7f87f7815f889ce31b3f88f56cd0e2589fac8914685517803db. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bae91365dd1fd722e5d9f02f45fa103184fa4343e2b4605c52da4bb9e111821. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cf9e1f57ba19c15a5ca769fb3f5ad22d617a8928ee8cbbefe2e7e2d4231713. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc102d93c9d01ef3b74f3495bd06f778a0800c8a371c89cfa1d279a372c4a06a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ddaa25af50c6fd6682be49465bcadba141a3d065e2eed3af608b740a1dff0a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e044b6167284fac0109f82688e08c8598ee7ade48dc4097ab625f1f8dec4eb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19604037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af93a9b7b7edcc2429f0a0ab9661b6147846102e3004536788278381fd2fdc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19494001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d445f5a24f549f8dd4cca435b83e21352ade2990b666d0eafe058cfe306f4a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19702643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8285f82b7b729a9e8ef3b04ba7f546cd1957ecc8bad6728306df94c6cb2773a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2265781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40830547003e034b03fa098557c268f52f4ea8680de3acdd01b99c9acab6a910. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2265782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d183a6776ad210e193523e25ae7ed02750269ce7c126dc0fa7ed0b8376a7333. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEI1948151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef6ee188b42a3188d355a90ef359e6f75315e0d7eac28936f3ba971b9d5d6e4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2462466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af93a9b7b7edcc2429f0a0ab9661b6147846102e3004536788278381fd2fdc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19494001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a28dcc50d7a175eea024a0ef3ac370327c4b731a7edb7e563566853c15efce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10413748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af93a9b7b7edcc2429f0a0ab9661b6147846102e3004536788278381fd2fdc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19494001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a28dcc50d7a175eea024a0ef3ac370327c4b731a7edb7e563566853c15efce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10413748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80675678c57f10dbbae44ab878f22ff36d31a39b36e52ca110f90401b739191. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM12403095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2079f4d030a89d0959a6b7de3ab3b94a205c94fa1cb09792bae86717eb9480c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af93a9b7b7edcc2429f0a0ab9661b6147846102e3004536788278381fd2fdc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19494001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c929a8595e237de463096bac9de537bc55b7c73229d40e790df3a195031227. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2079f4d030a89d0959a6b7de3ab3b94a205c94fa1cb09792bae86717eb9480c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400786.
The Players Club Music From and Inspired by the Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd15bcc621b59f39e96b0f6b6aafb4fcbc1e00f2dfa3b5577c0f91122cdf47. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAE81205882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c929a8595e237de463096bac9de537bc55b7c73229d40e790df3a195031227. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af93a9b7b7edcc2429f0a0ab9661b6147846102e3004536788278381fd2fdc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19494001.
Free Willy 2: The Adventure Home (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8541779e9df75bb88cde36669a3c423d4b7160d1e43893dd932603a7ea55a6a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f23c68cf2bbfbd926bfdefec59388960fe6d57e908e114f5d5d85b1e73a534. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19603919.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f81e01b7e635723adc3ee1e1c08997913a0d49f7919a9a45fe4ee0f2623fca. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526789d5a037b76005bfaaffd673c720c410251f946907c83448f1a0e33e476. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19900393.