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 0x2dce06ae911099026d6d3c6522e8f734f7c3570ccbb7b68621e548545c752ff0. 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/8596f32e-747e-4f60-9a0d-757decadc5d7.json and https://artists.proofprofile.net/proofs/artist/8596f32e-747e-4f60-9a0d-757decadc5d7.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 0x18ff9753b7579b0138458e8884742f9bf64b44b6479e3e9688dd9fdec890e6f9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NLHR52085351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb669b1d83fe1d95148e72be54a0c51b677e77121de762736c84ab7d737a6f6cd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/NLHR52085352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f0b7f03fdba867f2de4dd4db825de9bcffc0207552957c6660d2382e913ea5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLHR52085354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b314cbfcd90b8588d40f063f1abd4cc9d596cf87adf54eda2a64644d1bb513. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NLHR52085357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace9de41824c6187ab7896d8527b85e312f6fa3941dc8c657a1782a983623a9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:22Z), 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/NLV9Z1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8fe4420a21c4bc92b16ea2530d80721d7c0665c8183c4162ba22dabb2da241. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:24Z), 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/NLHR52078891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d76729137fee920d70f0c89e99acd38bd2107fd8e6dd75a88e36cdefbf1d3b1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLHR52078896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014e8a1f9185ece6ef6d4d248b4e12e4646d1f6fa703e844c08554e79fd7b67. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLHR52078897.
Impressions of a Pilgrimage - Der Klang Des Jakobsweges
VC08 The Women of Jerusalem - Ubi Caritas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe934e134273f1d17fce79749ccfbe325ac3eddf32079c2342ec936e01a2d5a49. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLHR52085908.
VC10 Jesus Is Stripped - Jesu Christe Miserere Nobis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f3725067beb021979a4c56e55837366cfacceae1c0fcc2c540d9d1787c9d8. 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/NLHR52085910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62b442d9ee55dcb36694092844398d5d63f68fe8011e201047555e22b0dea41. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLV9Z1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ca532e156903428bb4348486cd010db68a4984d5508005dbe719b3a30e192e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:42Z), 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/NLHR52079903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e132a13fa9665965b882cc324c4eb8839067c487eac2234ac630f904020c334. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:11Z), 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/NLHR52079904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11284e488a9ed65630463ab4add3bfbcb04972fe9183fb200383968edaba3bdf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLHR52102682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b0c5858a5ff6f7e7184412505f7d973843d94b03ed5c5a93fec540786fe2fa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLHR52102679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6575751989459c9a07ab3b1ff6fd9abf6277ca7cd546afe30574eca0e2ae81e8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLHR52121127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284df604b7dbd79da8e071ef63887a009d85cf5b691eb44ad609da36db0ef8c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLHR52121129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca11550398c7d5477f32b48a4832dc07585401a989eb03aea135ccc2edf0af. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLHR52121135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53528827bd14022cb81d506f56d2151def5662a2860a66c80dfa239b04780cf. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLHR52121131.
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 0x1838e8c21468ca946e3bdf767aa57bc0f3b8789b2f90c685025ba57ce684bf5d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLHR52121133.