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 0xb3053fa5f8e85fb5021e8bb3dd3869d1dd8fda6b9962f2fdd653338e76c7c8e6. 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/0065da44-0c23-4d7e-a9a8-bd5de71ada9b.json and https://artists.proofprofile.net/proofs/artist/0065da44-0c23-4d7e-a9a8-bd5de71ada9b.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 0x43978d7259188e5e1b6152f30293be606531e3c15220b57f229b1600f480ac44. 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/QZTB22472911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c86a3d1b53ae4b4ba2da828143cc05ebe898607e78ea2fbe6dea5bd05b1d74. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6J2410568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17077b471d313a30e6474b49494cbc7050ac11c7231f3d0349c7bd74bf9304d8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEZC62572612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927be7fecfe442602506c8d893c6d2d7555fd23d4a8773781fdaaf2df715ae4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEZC62572613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28c1065b42c18c0dfbdf2af1d81f12187dd3daadb9f0199d57422780b9c188c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEZC62572614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c714cea82543f11f1e8952834981f84e38ab83ebb15acb5780071fb8b5235. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEZC62572615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea4822da12853bdaeaa6556da55930796054a87849d3758ba9fbcb7d4c084e9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62572616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d1f6ff275314b731bc3f3f0c2ac8932285259142d17c0870d2bb321da1d2f5. 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/DEZC62572617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad353f815ca979416fb77d44f63ce19df04fde11ecf088bf1081abd99deef3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7L2447948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24737c547f2563bab9e26b1d2e4b8f096f054c3af9ea4e55b3cb5506c9a139ea. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZ7L2447952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066736cf3453158c7ffc3f49cc367e1edb4bbe45a1f70c61d04ce2af53bba31a. 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/QZTAS2599314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697415db4e3029969d24f5020061051c9c02257be69fce7ccdbe6258a16bc5d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAT2523453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa0d88e9aab13b07b757c0e8b459093603033829cce6383eefcb85b91fdccc9. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFF2568452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02246154648f9557fe33744b2c4d496f82b52139058979fb9983bdd51e4a139f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:08Z), 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/QZWFF2568454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511e7df3507099d345c1658a04703a77797a6515a857e99d16e2897b6772ae4a. 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/QZZ7R2506887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b2546f34f08ef1b952e40156dbb46c62edab261f709e7f322e22598bf0bf9c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F52543080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14afd84fbfd3975eab9730116834f89f7d9b0ff152d911e91ad95e794108270. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QT6EA2531555.