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 0x63aa94bf1c0d610a5fe8a1e79752ea5894a5a3c141ee8ecf7a34746576af8fe6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c4dc199-de81-46f3-8a17-835cb2b83ade.json and https://artists.proofprofile.net/proofs/artist/2c4dc199-de81-46f3-8a17-835cb2b83ade.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 0x4f383df2cc10541643bf8f3a22e2382318275a6015856e107741b12579bfaf18. 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/QZRP52225227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc66870be4b4ec4b81f3e713874f212eb604eb8d90c41b09f6ff469e91b33fd. 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/QZRP52225229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f383df2cc10541643bf8f3a22e2382318275a6015856e107741b12579bfaf18. 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/QZRP52225227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc66870be4b4ec4b81f3e713874f212eb604eb8d90c41b09f6ff469e91b33fd. 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/QZRP52225229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3f0ccfeb491ec868106514145060d1e8d6cce27022c4aa8d7fa5c66dc9a992. 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/QZTAZ2379188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94792afac5d0f14c2cc8b4d839e3c821973d34968e5b32d71a655c5ea0cd17f. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTAZ2379190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13a903d64a37ba9ec93bd6a938c9017321a1a6c30db2c940d28fe7bd1d3363. 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/QZTAZ2379192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2f029f2644c5b49ac4bbfba911ee4d43e5b62d497bb15c823044e4ab44de51. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZTAZ2379199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3f0ccfeb491ec868106514145060d1e8d6cce27022c4aa8d7fa5c66dc9a992. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAZ2379188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cd4c62ac06232edd3c38e6a4ec29401f9aabb637695a5a8154dc9f4a2f15f1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:53Z), 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/QZTAZ2379189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c7a6584d90dda407d3280686341c24f2b4a134f8526642363495466ad0f343. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZWFP2457004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539efaa4aefe8e8cf06fa9df66f26c00407d695f2a3ab300fca7c0361d6371f6. 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/QZWFP2457007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c65432b5e41cb4951686860db4b24cc4e0950b8dc4cdb29a4b6437b84d12c8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:55:04Z), 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/QZWFP2457008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f09f25ad0112ac0067d1ee7e62d6eab532d19f30811a43b91228a3dea2de80. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:20Z), 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/QZWFP2457009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae242f472520e37e263541a1d6b2ddb005d03f48f82c6c0d74d14b648c4b42. 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/QZWFP2457010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d633bbd93e390b92a54bbd5f528e124bf3439c379a58bdfefdf0665ff51322. 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/QZWFP2457011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f655a3074f7f605811ab772f4a519baabd14f8d164d13b996fb518840e0359. 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/QZWFP2457012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d5ea62834db86f98194eab5f2cb0bc2d89d5fe8264bec9f89db66967fe236. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZWFP2457013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185335c5230feaf0eb96b7f4637e052050a890ce6bda4df8bbfeec516bfb2b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2457014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4517dbd2cc75133565956a4513afb5aeac336f7c40f19e65e3751f030f24da. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/QZWFP2457015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f80c5fc975ba77efc14162e619800456388d0d789f8cceea0b1acccbbaaedb. 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/QZWFP2457016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4eb70e5e4d46a40aa6fe407ca83e70dc4b7b6d76007ba9341220a3a774ff5. 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/QT6EF2545752.