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 0xf6dad70ec366fceeacf351c1bfacc08813e6e3bd399e29d0750cf6ece4e90dff. 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/2715ea26-c852-431e-ba20-189e526a502b.json and https://artists.proofprofile.net/proofs/artist/2715ea26-c852-431e-ba20-189e526a502b.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 0xc3a6a09a50db1939a7c1e2a9c41012e29f54820ad9d1116fa80ed90e28e0dca1. 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/USWB12305987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb49ce9f1f677c64c5baab7a325b86add97ee50925f062db4e53fbad37c22eb. 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/USWB12004650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd248440772165843de8a73a0442b0d9e288d20581997ffa321c1de19b1941610. 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/USWB12301309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f82332ec747c2feccdc063d774596a9e24210b73b9a94862e423ca93d9f4d81. 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/USWB12000764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89bd83605458fdb4369ac646d3d385601c378f3379c4e21f2073cf995066f14. 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/USWB12204819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b34c04fde0af43b741709ac5d74933f1c88d4cb9b9d374e5d4e0e6188a000c. 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/USWB12305985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f5cc24d7853be78d14a850c8debade949844f85ba73cb81c320b0f9471777e. 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/USWB12305986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6a09a50db1939a7c1e2a9c41012e29f54820ad9d1116fa80ed90e28e0dca1. 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/USWB12305987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd57aded146f6cb94f8019dd14bef825d2668a86189d6c2eb4046cb818d28e6. 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/USWB12305988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b0c4720807f39f68d994d7b91df48b6d110f3b8b1a7bfc98739ff56edb453. 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/USWB12305989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851289c3b0b629517b44f0e1f26f6389d3e80f5246ded827ed2b35acc58c791. 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/USWB12305990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611b4a7e76232be6d86055ba1ffa61d0604108425394fb67a9cfd83f17faf31. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USWB12305991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549de776f70cc6b3a31705ad4af937851499c26eb206647618400ca965ed5f79. 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/USWB12305992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc853b1138c049b5eec722df540a0d1928b896407349dee62bf168b3e0633f. 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/USWB12305993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a8111958017bb411be70caf68c5f21589d7eb5f5baf78b23c05fb9a732c04. 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/USWB12305994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005af9d86ddf3ad06f2cc062acaad61da56bcfbb3b0925690471cbae5b544fc5. 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/USWB12305995.