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 0x262b0a4bd8171c4292673aeacafca33a496ffe3192578ee0ae1091d1e1c5c9da. 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/e01d43cc-552d-415f-86cf-6c2155d3a802.json and https://artists.proofprofile.net/proofs/artist/e01d43cc-552d-415f-86cf-6c2155d3a802.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 0x2b85767dd574fd3bf42c4ca8a572263f06045d7de86978b97e8c4c0460fb22cd. 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/QZMER2086553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08824ea865d0e165bad414b190f2a95e12799d3f3864d86d2fef840e270baa. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWY2054115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c3d54f37fbcfd80eec0338c49c3058f03fa17489e06390d29649b68d6a89d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62241721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482dfc530280bd77aa4fbda8f924623a8762c250ee60f9d37e0ad46b6e4b543. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:10Z), 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/QZDA82285641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2a616ffe6492adbd3bdc63e88cfb95ce463e1522b1f44b0b6a31a24ee13220. 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/QZHN92220692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a4eb281bf3f07f0e2a279167c6c28a1dea61bc4ec30bcbd84146ee02dd486. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:33Z), 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/QZHNA2260894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28472edbff74f8b2a534bc5dd1b45d376a85b7522d55abdda36a6bb0e456b7e1. 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/QZK6G2264419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf657a744d9b7e3c985d1753506dc92854077ae34f41f920eb6cc30a6d668847f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:10Z), 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/QZK6Q2116750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6556dc50d12a66458a76381b3060d3329850a1f276f4221dd0d8f201584877dc. 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/QZDA42378581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29c6203e3f6e4f9f6001b60323891af534c3acad73b7718594f03c609144405. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB22223861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a978fa24a4d9bc9f3dadf97f8e35612fad7ccb28f8d4294c9cd7b2a22325da7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:03Z), 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/QZK6K2364851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1d35137ae791cc8842837bf070fcc989a6c0427e314e9751cf247f540baddc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:43Z), 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/QZK6J2322306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31fa7b109581ae1752da2da7af52c655211a57ab72f01f54d0c742f997d3a35. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWY2307746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809256c06a3b3a938da96c135915832cd77b532e79a4177d65735aa030aef8af. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZTAS2313419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a941b8766875ed60106cc3a9f2c79be74065f19ceec2bcbb1114e0e1ac9899. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB52319007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b9d728ef0a71d76fffe226bb207703adaadfa9a088c755f4d333d4318b140. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB52319008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaea305b8b230569355d2e3134895e5bbe3c64e1e368d16d835341e7978bdf5. 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/QZTB32373853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4104292b7cfb2d729d61be3e8a2885ee9e2301f699cb9822d8f8d221412aa2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTB92367234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc546eb902d41dacda76adc8fbdfdc14f204d6e561b215f7d563ef699784b81e5. 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/QZFZ62417742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a94d6b8b3712cb747535b4eb697aab44d8f247e9bfbf498918d8b31b0d07a2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:26:11Z), 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/QZWFM2328532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850dcb19ca8ed26fca613537e7e11e24d0cda18d1b82f523dfd63d1cb060b8f3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZRP52459673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7283032609bb57ed80f2041892aa3b6e4bafe71d5c40c26d6fbb925410d8ec6c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZAKB2429636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e48938c3344b746000a45ad2e2b74a67b7cb906e6a55e43d5fed27dbbb330c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:14Z), 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/QZAKB2444079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850dcb19ca8ed26fca613537e7e11e24d0cda18d1b82f523dfd63d1cb060b8f3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP52459673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed172cf9ce8c77225a1bff4994dc273c8f6fc9ee0afcb9305899a2938d5ca5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZAKB2414822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e56bfd10261c1db7c6bc1e57d0d3a27e925d9a7934f7d2c7caf67ae92c0466. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZAKB2476646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c08221043a6905df9a3cde830629c0ffb34f9921e42ca2f6eb85252f30eb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES82241182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a6c536f3459d7c44cb078541fff83d70a4fa6489581e475305364977e346e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP52104786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f2f99194e5bde1607afefa40ff475f9f25c7b7465620b3e66ccac4bd7790b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLS2132970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099631f3b3ea94913e2ee715a654be9c7193a37cf62ec3bed00eb8ef5ef438c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS662133765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de8d2d9cf6762a1c1ff26d22abc657df6054adc96191bc4a1b7be873a09dfd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2140728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7669ab6177acfacf9b3a3ea6fad310a0b6fa9b9b523a89b0de6ad9db352c3c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2221367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f994be823cf4ec4b4339353918abd5d2c15414c1e6187cd49f82fc925c28a4a. 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/QZNWR2178567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6828a82bef9e43036cc694780ecd0309f376c5e848bddc6f2da64758b852b8a5. 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/QZNWQ2186113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9012f1b5decafa5226104b5f07891af871d0018bb7a84b9420a3136782abb0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72358791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55933a707cf31376e114216f37d94980d7f2f7f7ba0ad658bff0986d3263141f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:09Z), 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/QZS642112945.
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 0x66750196f9fb5c938a95c214f4a239666e84f5672ca240fbe97fcbfa0f9fd77a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZDA42209888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f467a37696d785ea7755908f335c8f2a994e55cbbd3f9c3ee2aa552ff8da80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN72358794.