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 0x42f93797dc892a28c988c485125cb15ad89578be931b000e266ecb0afe94d291. 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/5f2cd57d-dee5-445f-be2a-8bb61adf411b.json and https://artists.proofprofile.net/proofs/artist/5f2cd57d-dee5-445f-be2a-8bb61adf411b.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 0xf61cde2caf43a0c093f0f0ed8601245ff69c1e770b8ef29fd52af55e7d1d46fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG1927878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09af6777f5f28eaaad9ebc2303fed517d11df4e5fe9ee91f66aec62ae1895546. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKQU2003272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c9cc1753bd7afda02aa7e937075d37ba4d766aff65be3ff8bedcd3a4046a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHP2083375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccba265b9119269fab5ae18f6c9ce69bc027c64a613b684e02660699b2a95e1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:17Z), 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/FRS182089558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab354ff439c6f4b2ec1df5138d26aa15c4df34eeeb5aa103f2e00edcaece3f34. 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/US7VG2001136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1f75de96c866204b6733848e6eb2557ba6d780907cf036c8fa63f81c5b3ee. 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/QZHZ31912081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212892b8eaed59847d47731ae085cb84ae401433796dd6be594ef9ad124ece16. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM3DF2191503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc45f07baa7ab5586861a65395fec87e47fd4fd11706dd98dc1963a212a1ffcc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QM3DF2191504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b9306fd36a46da30229619bc125f59be2133ec2633582fd063ccf5651d075. 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/QZN882231960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e630368396701ff0bf784ed8d6ee9fd5df6b2f7d997ff063f85f88fd6352ab. 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/BXYI32100012.
Chill Brazilian Storm: Skate, Surf & Lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6db7f81e70a4f17ceb60f88f677bdd3a9f79cb7a18227e2760f22347e7a67a. 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/USANG2292406.
Chill Brazilian Storm: Everything Is a Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c92f1b9a5807485759c108f53df05018be7e47b0d7c4693f05327ef0296f03. 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/US3DF2238106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2533addb27bfd655e4509b895be18b1123ba7da95daa987b782da8200c4a58bc. 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/TCAEZ2059205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df949ad8cf7b4c8a15b2ec20f5034dca9299009c441f40f5554e23044675570. 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/USANG2028925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8de12bd94157132eaa9cca6b31e64e5239c552ea16a85cb3a8467921d04e3b. 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/USANG2057166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f5f38a731003306757e78720358d6a36158f391185b6bf51d1e1c4c87dba9. 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/GBKQU2144261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19a4e57331d9ba74bcfebb5972453270cc81875bceedeab429c4a43f1eab604. 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/GBKQU2101991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528574c296097b8331bde92ecfa18be92becf8e63e175e26ba1ae724c5c107b1. 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/US3DF2111136.