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 0x3b777c2d6ce316167581565ebd453812bc9abeadf0b958d61beba028cdd6fe89. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38fc17b3-3f40-41e5-8bff-edb5571f34d6.json and https://artists.proofprofile.net/proofs/artist/38fc17b3-3f40-41e5-8bff-edb5571f34d6.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 0xcd6080d4fd40b00728e2a1a31823195863cd3b37c30c0ef9c1c232d8f20ddf28. 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/JPP561100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eee0e468aa12eabbeff041375f9ba67d9ec83625632fdc79de0ab1cbfb4b8b3. 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/JPP561100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6f6107ee0de54567bf3ad4e315af582e85108ade4166306c541de5d95c489. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPP561100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7359e0f7ba11fda83e59e54d62348d304b0f2b1537c5a0bb383ce518a51b4a. 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/JPP561100648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1be407725b83b3a0580b745957128dc3ea47201c4779659558de70b740cb7e1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPP561100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af4d578a3020345e39e080526094326931b1c0ef3b8e805f655c5a2591259b1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPP561100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd9fbb4c68d6cfb850e40c588276c10ec2b36a4c8e1ca09df05b0213078a43. 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/JPP561100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b02b95c9238cb86fa27bfed1954299a3470291d42bbd753e29552c9bd2d64. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPP561100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51429ce8cabcbe04d944afc737312a6f9dbdb3872cf439d11b18de7df466e141. 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/JPP561100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10266251b144bbeb2e78a801fe77f03c08a2100b5cc59c36f231fd7323763f8a. 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/JPP561100811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc16fe96265c2f89d852c4199eae71bb4f88e025c6b2b9f8f3e310bf749175. 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/JPP561100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99784da9bf045e571f71bf5fc2b0aa8e65bc3f54877863a73c30402499d8eeed. 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/JPP561100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc1e91e7ea3358020af0e8142d3f4551ecdb1412d5d8a9a9a10e0bbbe928e04. 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/TCJPU2207398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978591e17db77e92dad09a9f355e0cb287a5ce772af06f83fb78cab760d45d4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBLFP1518363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08287b5e0caef1227023f1d9a62f6dce550ebbb3820b8fd9c685b8a7b696095f. 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/JPP561100002.