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 0xb26a8d069668f5a6bc9418678da1fc8aeadf0661672583e4ccf72ea346d07e46. 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/dae3453d-a023-4c7c-b4d5-deda0a4a3970.json and https://artists.proofprofile.net/proofs/artist/dae3453d-a023-4c7c-b4d5-deda0a4a3970.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 0x47d4583a344881f6c237f0e545a7b82cafac47627ee91acbe0144d20d2c75244. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAJL2575707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d5f431c9a78a65238456e0e3bab3ce8a3f42e0b10cb8b26f3c41f6a8f9d8c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJM2575640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c23341f947fa9b1de46b1efc5deeb6b3bdf89e1f06f821251c1939952e4f0a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJL2575837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439c1ddd237d81e7a39515bab39f7db34c2861172f3cf1fc84f464b6b9c4e0e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAJL2575777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fbfdff8b857b51e2c9fef2079bbf4f7c4ee27a1b571341d5a1b9e5c8c1c63. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAJM2515566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d0b93e4137d0788a5da0123bc9c3571b4484d5d2b8c3c5abbf0a5a7ddee58c. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAJN2515668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94724792fc88ac133d46e447e885a75b927320514cdf116deed2eac9fba8693d. 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/TCAJM2515650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab106bd4d7c61579bfcf37566fc5f5b701c9b05a86c6a359fc9dfe1aaf384f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJM2515601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7c1bb3b9f3c0aa12342722ee81d042c74f1b5fec7cbfd4a94e4c83c1cc964. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJR2560119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21236e1aeed71e2d331a54c2979cbbf9c53e890d290a92e3f45dc0ae6415341. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAJR2560306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea887c7d01e89dac25292b9c52790b9178f8b41473add076093390b7fcae009. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJR2560206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984675ef662805e189134a56e6888c71372912a0784f41cc636f22133bca6ac9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJS2560292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5e04dea81f3d2ce39ee8919f8baa17aecec920ee928c0be7bbf89d34924370. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZZ7V2555992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6fb73e8e997068ae2947af2752420d697ea31b65278658d3b7287d9b4b190. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7V2555995.