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 0xcb16081a73ac4fd3b93daab13690017faf1cbbe4b40c00447e21f1dca7279ce9. 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/d5ec1e70-a024-42a2-8526-7bc88d547d4d.json and https://artists.proofprofile.net/proofs/artist/d5ec1e70-a024-42a2-8526-7bc88d547d4d.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 0xe52c18804acddb5268a3315ac36231842981efba9b1d51ccd7a44207b82f381a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRUM70801141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9df65bde3bd26952afb64aa87442c58b4a77c440179acb59f4313bf4cad4d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRUM70801143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d1d4b72f2baebda97851cc15cc19864f51e33b1c6b5ab026804798e9df572. 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/FR9W11508000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb150f0a5b14fea9fbe3319cbf56f772215c56766dbbeeb8bd9bfc2adcd36afa5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR9W11508002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77e389fba0db9724a81c9229c8d3665f849ecdd1c0cc6b8cfc2bdbc0d923b4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR9W11508005.
Shadows - Songs of Nat King Cole & Live at Jazz à Vienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a73224c12baf56c22b6559c4766e8b527e5bdb0e22b829675821f66cc8f8156. 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/FR9W11725127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf48f6262246d966220cfedad262e40015e966deceeb8a5bc33790d6f8860529. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR9W11725130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44bc803c356f1216b45b58ed9947e21572a3a27908a08c5d8049c956d76070. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FR9W11725132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b689205f89cbf76e998c0fc433b596cfdc54665a400dea4d5524cb31b55c6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9W12371641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b59f51db4e8963a83861d66c8246f371c5f01b5d068e12cb9dcd39f27c64e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR9W12371647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba928b7b201e42d62698aeb010d7c3c5909399688faf68d10961a31c18d82b59. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR9W12471472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932eebe4b5e8ef42fdc0c5e505d1e0986b59f99756cc5b5edb18657e872090a2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR9W11000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed8ec505a55c3f71845f9b21032ba32921bd1836c22db9597797b56c64822b. 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/FR4EO1100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e82f0bef7f41558d7bea41481ae9a096a4cdde80d018751348280417c3afd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8Y71700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688331df91c6cd5c111612647e9ea58cdb320dccf821d573519b691199e3e7ba. 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/FR13Z1000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5361c06c3e84c53926010c0d56a89d0370b75099b94022029b16036a0e13986. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FRV112440001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35155e96cc63ccba809492853f1281985bd641690944be024c54d0f1e4283a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRUM71600172.