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 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 0xc1efcbc012e292b3ec87a7dd712334285452151db71cf77941452683177e8de3. 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/80481c64-385b-480a-acb8-830b941f791b.json and https://artists.proofprofile.net/proofs/artist/80481c64-385b-480a-acb8-830b941f791b.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 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 0x67e6836340fe6df14a2a1b29cff99cefcdcd921cd95b2f93991984a5119812d4. 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/DK4YA2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1a39fd9ede2b8eafd51d7580f377133965d8718411176122f7dc0d4322f591. 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/NLZ542301591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a41d4841c9df24e11c87f7a63f7dcce8852a1ade987d0176afa3ca2f5454f3. 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/NLZ542300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0fb4615232470d72b2fe5edfd2fe1cf946195b65f3124e32e9f2ed2da86e34. 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/NLUM72300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afcdcabb9fa8b507ede4c01638c1a0c102229ac6e7836a0b4895e4907d4dce. 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/NL6WK2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa54500f7007f655cddbff3035ed9ef9e0ff7930db4a512b5e6ba12e2a86734. 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/NLZ542202402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244e72e82e72703178a68212357fd1b2b7cf10b866a017443e23ae4d0f8dbc2b. 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/NLUM72201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67a391a05998f023965ede372961e6413d174031f99f964665f95f8f06c075. 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/NLUM72200681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e8d1e03faba94440e463f0b2548a62d5d9307a0dd312a74cfe9a4b29111a2. 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/NLZ542200670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89e49b91b456a80a6bc5d4133fb28dee71fb2e220042558b0d72d0f88cdf26. 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/GBKQU2236623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc57cc0c65cb8a5c1d2e8ee796112d38fe2670f8f9541596b253eddb2a9450b. 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/NLT2H2100926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646a88d6b224dbbb9cd2e06bc0b5c9463f1bb56c4ad08387476c5f4b9af989a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBLV62100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32ece0c3110962f611a9eae52207bf31e4dfecd8a9bbb8760b89abb35c9965. 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/NLAM42100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08853a4a3e0cb11738c0b38b97a87945bacc944993049be57fcca9503cecc4e8. 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/NLG3N2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7200995e1b76717a850c26b1602e5a657480e25ec557ccaf89377f093a2928. 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/NLT2H2100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12ef68fceee94a12b8fd7eb4728a52b26b119aff0c10bcbb47064be9da9bc53. 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/GBLV62025701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b087943f82481d3dd0ce9629ec7b76bc61e31204fb1bf012467dfa11fba16e4. 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/NLAM42000265.
Long Train (feat. Chris Alain) [Extended Mix]