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 0x87b02d1a7aba838eb8754e7d3536b8eb1a22e3d2e18b01462b62da9da130f939. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fb27477-da1e-471f-89ca-62e8ad0dbd49.json and https://artists.proofprofile.net/proofs/artist/0fb27477-da1e-471f-89ca-62e8ad0dbd49.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 0x9b9df534304c51ec9c60ccbb69563fa4d758ae86ba42f31e376c77e7e8895341. 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/FR9Z62100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439616800311da615cd1fe2ee0f356ac19f41f7f15530ecc94cc442746cdcdc. 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/FR9Z62100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2d834a204227c986f238d58820e76b56430f8645fe144eeb2794c095d93dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9Z62100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b38f0d2e4e3d0cd70c5f72b7252a8b8ba86343efb22b1b7ec7db498dd9df8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9Z62100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f8fac067880896c2d8ad0342c9d8845c860daf674e5a4be6b9ade72f76d17a. 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/FR9Z62100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd961e5b3232aaded2c35d5d483689d486601390aafb493041f1160eed692ef3d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9Z62100522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d795b1380bdeb7641f3dd7ae7a9cc11055f2afd01865cf2bc039e110c9b8ef2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9Z62100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353a48419277e3baf6ccd54b723a5d8dae328700468f9b2956b6431354241929. 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/FR9Z62100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b3f4924ea95bcb79d04898df980ed48df21ef3d5a1b8c6cf150fce9451c55. 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/FR9Z62100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21ca03b9e803d4e6f04bb8caa8a24182c576822aa658365865ef7e257504fa. 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/FR9Z62100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca474189abc2c56b76b888df188426f205ed1d33836b7fa5569179d0fa62db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9Z62100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439616800311da615cd1fe2ee0f356ac19f41f7f15530ecc94cc442746cdcdc. 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/FR9Z62100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d795b1380bdeb7641f3dd7ae7a9cc11055f2afd01865cf2bc039e110c9b8ef2. 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/FR9Z62100521.