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 0xdb51d25bec1ced18e695357325ed33f5e8a97d0ecf8a0e9b1610f57146681800. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/803163e6-f9bc-47c1-a343-9e86e85a4cb9.json and https://artists.proofprofile.net/proofs/artist/803163e6-f9bc-47c1-a343-9e86e85a4cb9.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 0x0410bec2be01d96f24f4f6229b82eba5589051b5205c7b0f3888844eebbb1e0b. 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/USHM91236739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a83e9dd44dd80ef224269d92e6302ac9cf67af9c3a70e633ab269c0770a256f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:38Z), 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/USHM91236742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced2020ec3258aff60988eba1e5f0b5d1de5330ce714ab71a08fd3fcee47fc77. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5FN1723643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4186d4a5669710a8c4979f9bf32cf06bc3367fdc2da3dc933006d9bb1a2770. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:46Z), 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/QZ5FN1723646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ea4ea8057d44ae9d5b0bd2fede3270a231f4997a515edfd5bc24776854a4d. 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/QZ5FN1723647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c59c8f57c8f451f4575401a82f0ed59d68d2c098d2a62d39918e83836139ccb. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZ5FN1723649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89465ba64d69d4b4c399ccac168c9e4d819616d61505615a900b572abda538ae. 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/QZ5FN1723653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4621895d5c46c5e0c4e5c9f1a2d5b712dbdaba102d60c1c7206c0ae8fd775b3d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZ5FN1886781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647deaf65514a8e133aa9a057183cb64ad2bd13368829d2ab80122aa9c0220a8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZ5FN1886782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f5706f905fb3f9351ac3af523904ac3d6a169b90bead5456584ebb222ab6e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:46Z), 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/GBWUL2051560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c09ab74a317f4f42a03367f8e5205d488b363018c7ef5c79d28947e187398. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBWUL2051562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd15809a933b8c1944df7229f52d4b498a0006ccd5c321cf1213a80e8df19e. 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/GBWUL2051565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b845a1ae4d557a6061de37be9c29288bf6d07c3c3d681174486df07b695e8. 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/USL4Q2340947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffff9492413d5f71c60536938a09cf18de6f719bfb593cad84544fc0597569c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4Q2340950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77e42ef3c22a7d0c1f45c7632d0022f93ae1c371d0b5bd85b0e2c494ef94cd3. 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/USL4Q2340953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312468d2539031b45156e169fa5e78a22023dc84c65883f15444fef885d6774. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USL4Q2340946.
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 0x14ceaca0899725883c9c2f55a9c52e18f00cbdec436e047052edabca3f93e172. 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/USL4Q2340948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0249fc593011a2a82395817418fe963dcfe1419948d9a78dc5374213fc7996ea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USX9P2372657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd36b25cefbcd401afd1dbce4decaec5bc7e63c7dab52feb39e0821fcf1dcf6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWDE2483821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765581a0de0433f5287fc9287ff91c0f6e8a0fa461420cee9bab1ec5b361a267. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:10Z), 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/QZWDE2483823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d58e08d86e073791ff0e50217caa6d0a5e53cec718d0490858376026d9105. 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/QZWDE2483825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96250f1d2f8d9f8e1705718a7d408a2bebeb8b3018a43ca34737c435f63c491f. 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/QZWDE2483827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e64eebea291db302c277f28044bd169a3fe7014fe9b9615b7ea54a5e2cd002. 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/QZWDE2483828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ef27bf2aa658e105a7ff91f07ffad50a37a375ddad709427008a28b7a276f. 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/USCGJ1182049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2116ea58ff065358ef49aa69d15afebbfecd56940115ad1076a150de47817b2e. 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/QZ5FN1722936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9120966db24d1a551c6eb926fa339e1e44403d27e2d5d609725b0c6b67b044. 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/USHM91236740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fa3c51df01022e6d5af05bfc55c8cd8d694a0ae769ade0719556e15113a16. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBWUL2390605.