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 0x5c4e3c1077364d793198cff57449d0beda65e17edc672afa7a420fbfa57e20af. 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/30b2126f-539a-4086-820c-bae8c3360a1a.json and https://artists.proofprofile.net/proofs/artist/30b2126f-539a-4086-820c-bae8c3360a1a.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 0x9697106de29a0cb64c020d140be5c267a4696e0a303b73447b4482f1152b9629. 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/GBKQU2176824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce486e13af5631322c88eff6195aae2db9b91aabbecc04cf9b213754972ad28. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBKQU2176826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea25254b283428e6f2e2402fc461164b07696a89f8ba6e74663b1dba5687574. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBKQU2176828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df34e95c19638e84bda908957be21ea0805596472c18344158f80e3a7752cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPEW2235057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b12811447e3aa8b398fcf4a295591c95c2e3eb57ee29c0ac9d02c7bd3654800. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPEW2235058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3026885668f3697af9f3b7f58368dbd7ee1ee5d7ba8cb180318b828421c5a26. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZPEW2235059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c1c18a1034807deea2eac8cf0222e7b186a49797bcb8597b94a6b8f2f37d7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXDS92200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0930b4b4bbff9e5894785ffaf911d884136b47c4639fee9068855cd1bb0df8d. 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/US3DF2248184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8555007b0c0ef6c6a083763bf4a271a7c953e5c94efddc2a3a1e64bb69ffc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:26Z), 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/USANG2222335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0e877f246be84981e19aae091f43d19b22f0c8788866b276e119fd12b94a27. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:36Z), 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/USANG2222336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f135944d763664aca0216c50bf5ceaa765df6e24e4a99942991c78116ae4094. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:12Z), 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/USANG2222339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9432a12051dc2878c83bd986a4b2f53d5cc649b17e9ee27ba86de26203519551. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USANG2222340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf868047c8c6a62950ef10320c1ef8e1797600d5b26f229c3345fac299f2153a7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:40Z), 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/USANG2222341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e552c09c5f5a79ad4a0e416a2c816c2ec0db5bfe824a1694dec7d56b68e05. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USANG2222343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcae3aa269f05175e68251154fee8190b4a76078a2ff9c2c0bfcb4a458a8318e. 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/QM3DF2213058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3639c77dc10d6b4b3333877b743a2d706b959a672e009b2d2a39dcbb5eb5715. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2222920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9ebb11f513640313578277d188169222bf89cb0dfd7156ec26a4c2c07ea7de. 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/BCD4N2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda210471e1d4f7f47b94ca36c1b799c5c6515a82815676a7064a72d64719fd61. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USANG2276990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5bfd265d80faca08af3d272c698663cbd45fa67ec649b0ad365d167d4a69c3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2292480.
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