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 0xb67a323769cdbe45b8a740389af043216ca692adb0e54071ea71515216303a65. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4954ca77-7b8b-4eb8-8f64-0d7866c86765.json and https://artists.proofprofile.net/proofs/artist/4954ca77-7b8b-4eb8-8f64-0d7866c86765.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 0x7c02b0591c5436c077b00b1c73fd7f063561d6791bda9c556703a86411324c93. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYW2129644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe605fbbaf9d5f006b844594db3777b566f06121b32762447bdd7fb2ed9d6b2da. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFYY2130385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a95c21616415122fcc5ddadc42df1f2a88b09b77f6dd7b51aa69f2a5ec1ef. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ22151300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fdc4d42df0c58b29b4c5263b77a2f9622faa852387fecc5bff2071ea0193f4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYZ2129645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b632003b02a987fbb991f0c0506377aff7bfefae8bc8e9a7c286878b67f322b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ62170137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e33891ed9a58583651d027007f3889325b5d23f0e562121c22a61209a2ee46. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA72142439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e10794800d8528c8aeae26154aed4c8894ace1d852f39e3d5b0526d246c4af6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEN2153373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195bad59a375a5e23f60813f31715c482238e8c96cd4dd1dcf524dd74a50b64e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2149485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a590868253f2e109498a5e68f1f6fdddd8998ae8797ff6f9889028177502b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2148540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211c58efa5822469bef268c51c72bb708101e30ff96563aef6e712616f2c8dd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWZ2107211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee04af0db591d42bb620984f822dbcdd82debdf48ad9e3dc149e09a3ce5a49. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2175020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0655df5d323f82e5a1d11ee282a49b7c060d1c3141c740fba7dbd2e1c18cd80. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:15Z), 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/QZHN92202112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93199d980ad41e5b861c15d9396ca290e69d19c59d922fda2ffc11625c8d6db3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNC2265437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ee896482966856d99d7dd4939ae8c120d94436810783dc3203d74f60fd5020. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTAT2246663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16714c827397420d551d8d1c6099591a6b68aaf9e57af8bd086e58a14d8e290. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAT2246664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd9b71ca8ce0c4ea9e57cb7da6f2f66fd1362305fc93a91451cf8d28ce6e1f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB22235446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc3fc5b702253537e27aeffe0fa474b54368fecec7891cf71a07ec73031f98. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN62348494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471e1f4d0fd159d715fb3af7343ed99b04e0a6c0b61a910169c173f5c86e2339. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN62348495.