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 0xa06907941a8670e9a8fbf784401cdd59d7d9e87a137372bdea9153809a4c264b. 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/14d0c91e-2811-4e60-bb1a-70ed4547d3a3.json and https://artists.proofprofile.net/proofs/artist/14d0c91e-2811-4e60-bb1a-70ed4547d3a3.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 0x93d60c0f18b9a20ce520040c8675934a54f03be8443a9a80e4c9d495068e84ea. 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/NLUW21800677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f83604549a02fab76bd8d3b0b83ce136c8d8434f8607ee5f96c90d5eb44409. 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/NLZ541701620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867d204e3fb9bbea272e8cc9922608b8e419ad3c753f68b5f115af403064017. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEQ321700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60669192b1c93c6a568a51139866ee8cb5fde610de5359b11bcc9b49e7962695. 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/DEQ321700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb44c7acfce9ef7e9dd4d68e97bf7a61bb29a074fe0f03e185894343e78b3cb. 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/DEQ321700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53978973a71ff8c3844ee7e789691ebe53c450a1f91a7c6799aa4b195bf663ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUS11700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5268b7dafc929e670cd1506b5a7419c17d463e2e4f7a6fee32a8cb4d71ad47a. 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/NLF711607997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a47d3fc24cf5f1421f0b8b738feb809b2490cce8d25b7f339948587de459ee. 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/NLZ541600681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4143ee06a9ec80634433697654d1f96219aa781a00e567a9681f9802825b8f98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLWV71600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce63137707bf15e5d0e9aab57a5f98ba891cf0769bf60ff4a0f7194cadb303e. 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/ITUM71600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3491ae158e76f8d37821a5faf3005b8d8c9e0a728473a01762fcc4ec5a6dd83e. 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/NLF711600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8fc04305c018c0be6898efdf71bb36f5c28352d76a658481231f4a166470a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLF711506634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2340b9f0fb5b38935f1f1c21af6820527282072e019a3733a47afcb9b5ec8a36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLF711505486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ee0946b94c40ad2faf952a8e09dd6984c5c90603bd1982ea79f4a3c41519c. 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/NLF711505485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca623679abb2e45a603d86d70c8862b2bfe325955c87d6a585da62d847fb45ce. 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/NLF711503920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc510c47f2624e47b2199ddf469c34a2cb0439ff0b36a8cbfbc2162c6e2a70cd. 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/NLF711501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae800b7fd6e0404eadab991bc54f7898c274ee14442b2159e71ceb143347ce9. 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/NLF711500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bcc66b657851a3a117c700aa3675c8de24b6e53487a006f0e4d94d715e88bb. 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/NLUW21400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62b38614c0e4992bccb0b62ffc04bce159f305e26d775195b601d450fdb3bd. 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/NLF711401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bc0b1cb45e94d4b2c61c4ad1f007156c5056af20d4e7387e7ee35e65991c9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUS11202499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042cee7885cf3522c426b09bca0667fcecb39e26f79c460ed724955afa1d5583. 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/NLF711400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cbaaf31eb04077b22e2db3afac2ebe101257b791b6907719471d414b8d7761. 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/NLF711312342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2d55107a804169f616be1fdcc0fa89c7863d42c027d2bc143b4c2fbe659290. 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/NLS241204084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9628b6522ae64fbea3653aa1e19336821c9153f8e3df261da7a92734829142. 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/NLS241204085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a47d3fc24cf5f1421f0b8b738feb809b2490cce8d25b7f339948587de459ee. 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/NLZ541600681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e354419446c98446d8663d5a21841ffe5b530d993d3aecdf5f7a2fd65154b. 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/NLZ541700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e354419446c98446d8663d5a21841ffe5b530d993d3aecdf5f7a2fd65154b. 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/NLZ541700307.