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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c354a9c39e4a3f1bfba11009bee85f3e106f66aaaaadfa064f98388eb0e3bdc. 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/2139e173-7a0e-49c7-bcda-806f790773e7.json and https://artists.proofprofile.net/proofs/artist/2139e173-7a0e-49c7-bcda-806f790773e7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6453248897a7634a888a04a67c2ac814af73e7524584693389c4c4a9dc86a161. 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/FR85U0800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e30221a4dfaa3938c15fb94499846b9fab30eca0d6b1ab8543966d481ab746c. 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/FR85U0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ebb2f99275ee6a2c0794d745753f5556fdae5e004381623fb84d6250a32f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR85U0700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc221b3873fe3e10579762d8abfe674f3e78005f13fa749f54090c6f76b708a. 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/FR85U0800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352588efc93e3241498f9573a2d2ee43cb2f00e3ab30e2ef389667c167b4e14. 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/FR85U1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c5383ee92920b85f62ea1cc5b02b1ff77ae953a99a8311341cd9b4d6dbd86. 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/FR85U1100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7135ad54b2cdea89d098b7ecf2b9ae59091c6d92ffd20a5f4dbca62b2b1f9f76. 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/FR85U1100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296aae5c7dee41cf42315003ed550dbf603c62adc495f873424ec9e28d53e8f3. 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/FR85U1100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cab1d7fb9cfc7fcace33df9f7ca6aaef969f0ef07a6d12b7b7703b974b0fb0. 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/FR85U1100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56297c626bef5f23691d2628e4be986dcf998283d8a5aad76c90ae1398c288ef. 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/FR85U1100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5bd84d2c90e8c138740c0a3373d2d304643b95d3ca39d3c42c2ea493591c90. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR85U1300010.
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 0xca0611dbaa90b151a2409fe6207874eb6f8293cdd479431cd6b15cae2c0c3553. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR85U1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50adbdf057a3bbd139cd060a9c7b57184c8acc0e293173f1406518e02a3ea65c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/FR85U1100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7204a6f45f01f55b3f920f0eab0a5109c3f17ac844f2921360c2e853c122522. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/FR85U1100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dc7fc8871acf559a352292eabc39dc11727c90f90a308ba32fa39ae139cc73. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FR85U1100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f040a37870dac9e5eafdaa76d29dbc322877565eadc0ac622e0478bcdb87e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR85U1100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62287e9a2a3e751a5636ad11b261da8dfb57a485770604b7251104ca291b1b0f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR85U1100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f12510471090ab809238b8d88da7469b9f726b32606325cdfc6991e0470f88. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR85U1100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c8bc352c62f558a6f40c8a30bf58bdb0b34007f52d67eea87326bc3fa20cd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR85U1100150.