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 0x75426d41bc014a0b99ca94b4824b29c9afca3cbcbcc507db85f66eab1666f4b1. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a95d52d1-8bad-4cf6-a951-66f15105940e.json and https://artists.proofprofile.net/proofs/artist/a95d52d1-8bad-4cf6-a951-66f15105940e.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 0xf084dadcd300d4b572cc97459484c1724a0f2b20668531b17e3716badd54308a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA0L2348505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d163bf43dfccc182bbd13ed3c93d86a6becb2886b429725999ac1842810afc. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DGA0L2348506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60fac5c764d79a510ae86847c420d0a5cae1d05f0104e79f3af175637d0b2c0. 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/DGA0L2348507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e72e3543b804d53d33ea618672eeb4f04132ec2cb1ea0733f7483e71229fae. 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/DGA0L2348508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aa8b4828f96ec33f7dd4ad37c87af5603a68379ba532357e415af7e034f799. 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/DGA0L2348509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0e82c5995dd15f361fe372c41b409a15e9ea0fcfd37cd902a493a8ce73046d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DGA0L2348510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427a8fbab3d62acbb8b98fae1a7888b2a49a3d28e1e84e3aeb2a8c07f9358f4. 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/JPS801958622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b805cc26a28680325fc8f434d79623fe80963458e27bf6f80820f112bed582. 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/JPS801963768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54078f4dc90f2e6fde8ad3f5ba33160899f488d130f32a760ad68bb8e74518b. 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/DGA0L2348511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2ae76629c6fd1bbfbb5c170fcd4c53ff57c1b066769755e12400fd7906be2. 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/DGA0L2348512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e72e3543b804d53d33ea618672eeb4f04132ec2cb1ea0733f7483e71229fae. 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/DGA0L2348508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b805cc26a28680325fc8f434d79623fe80963458e27bf6f80820f112bed582. 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/JPS801963768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b466f180b13ee4431d29b4f5b50035edb974ed60cbfdc88eb8c87b3449f66. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPS801962106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427a8fbab3d62acbb8b98fae1a7888b2a49a3d28e1e84e3aeb2a8c07f9358f4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPS801958622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f1c5afd1d6d2e1f5d23e75dca60fe3ec1547a032ba2b5bde7a9890fa3d5381. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPS801957745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50abbef4053331a1f38b2e359cb7d1108b771c7d57b73a313864232fe42dd72. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JPS801956529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98974bba9a1c299152f29201c788f9d2c32d86f5ff1b9a6cbd4f7df527e718fc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPS801953005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd372e4ecc48d6a5417f1e89fd09bb0f1e237d77021e66ca75f9dd8a1a34a22e. 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/JPS801953007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3132cc3000621f9d94075237777c235a6e5d5408f97eab6b31222d72443987. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPS801953008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd372e4ecc48d6a5417f1e89fd09bb0f1e237d77021e66ca75f9dd8a1a34a22e. 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/JPS801953007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98974bba9a1c299152f29201c788f9d2c32d86f5ff1b9a6cbd4f7df527e718fc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPS801953005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f16aab427b2326904e2153b9ab47490a2cd803b9e31d1ac8bb7d352d8fd10c0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPS801949577.