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 0x39f5f941108b325e802a9f7a03532d48af98b90c179c46db78b75876b65361e8. 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/6fce60b7-4635-48f1-ac9f-9820c4f966b3.json and https://artists.proofprofile.net/proofs/artist/6fce60b7-4635-48f1-ac9f-9820c4f966b3.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 0xef90a7a3db264b58ed2c511027f3a471ca74481296971626333d706d3881d53c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:46Z), 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/QZW9M2417114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61863687e90d37a14cc17c6629eea96cb2397f1ea5a94fea9fe5cb98ac6ca19. 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/QZNJZ2495777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd614880b05ef33687602183870a085e99d43272e71b3ecf82b7b0ed89558df. 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/QZNJZ2495778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891714f3d1f60c375c23afeff1f3853c1daf115295b6e1c5dbf70b1ecd1d813. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJZ2495823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b7781ea8c1e89f9b803cbb500582b786357f36af207a84f383994e850d08d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZW9M2416962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b7781ea8c1e89f9b803cbb500582b786357f36af207a84f383994e850d08d. 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/QZW9M2416962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61119073625103f2d9a9b0132570c62b022352023647e8dcbb641615da7a89e. 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/QZNJZ2495781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00669a8fcacbfe0de2464b8a6be2e6bb5188f3ad941b43693c650cfece6054a. 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/QZNJZ2495782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ef4fea3b5d757c2c62bd9d548461ddce6a4619ead4e1773887ab2564978117. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTPX2406631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce75b30b9a8e3b61fe9b7470d84f3f89e85c4757471ebe64d4e80f01ddcd9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9M2416885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8ec1cc6ed3bd5467a5683ef70a8774a9a3fe93beff8a5c5f56d2d393d403d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTPX2406632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58be29ca004e5cf20a4543fe8d4a9954fe6d38d13f10420ad9d9f55b9d314206. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTPX2406636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef64b4dc43e78ebb4b82196d0b8c00b05678b3385dcc2e08ebbad1d0ac81b35. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:36Z), 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/QZW9M2416856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e465f817559452d29180b6b8f9fffe163085da4a8b23e11122e3e3e2349d3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNJZ2495727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f27c30db7caddde4a604c39fa48270725f6c8eb66fa7ce8dbfb5d336f7eff. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:28Z), 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/QZNJZ2495728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeedf70fd7a2655d3ea50511e50646576f8b5c1a107d8428d1423efba157d31. 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/QZTPX2401622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7087285038085260fdf5522147fe0764496dd8de9ff9ea0a7693d04f94ab3d51. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJZ2495707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cc873b6ce062d1ef1fd153f1825b05fd8f485d0ef3b396c7553d5e7cdd1a3f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:13Z), 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/QZTVM2495242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441b8157f07eabe22418cce88db69f8369720620f53e458036e54ca56c58ef7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:37Z), 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/US7VG2525202.