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 0xc079d98ece1f4e260df8ead309a68c2adedff7f2bc8fa71f4f1aa3425d470344. 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/6a8dee89-eb2a-4421-9dd1-675e4d89c5e2.json and https://artists.proofprofile.net/proofs/artist/6a8dee89-eb2a-4421-9dd1-675e4d89c5e2.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 0xcc6119031ab833a12921ba13d05c5a406981d5bb8bd4dcd92b7ff9f1a3c60cc0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UK6821805651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6a329f10b04a8f59fa6b0d8469b1399998aabae0dc94e1e389fc5de79819a. 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/UK6821805652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08a59f9a4dcbb5f60bdb46385b17a980f256fb1519c0ada117d5cff2817a8b. 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/UK6821805653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a812804b74a13dac2a0cc1eeeb3a0f22d2305eba5b311fffc6b5e1c46428aa. 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/UK6821805654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8096b0cb3d5f190da7009c298467d9e1db3f040a9d2bc57639e35db9a6eb7cb9. 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/UK6821805655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c3bb6f05ec05f713dd07deae1e2805ee80eb94b1e5ed096e345c899e233dd. 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/UK6821805656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb08e1743b873034b8643a47a5bb8cd5aebaf8045e0437309c64e592b6d6f5. 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/UK6821805657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6cad610d0f886d35010f413b32c5c10bb7ebbc597baad243dbe7f2de0cfeee. 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/UK6821805658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566a7cbae8a66abb1040c75ea65902145c0d5c475cad4b7f3faf18b3f3e2615. 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/UK6821805659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491964009971d8dac6d8406b27c0fd2f547ad72ffdd7150043d714254550d3b. 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/UK6821805660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b88d4ca754f399adae38005621c47518e43924d38c449412f0a4524a726b7. 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/UK6821805661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab10f02b753e9146511ad5d8d55c0e4b26908d748648c71ada8ac615d048b7. 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/UK6821805662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6119031ab833a12921ba13d05c5a406981d5bb8bd4dcd92b7ff9f1a3c60cc0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UK6821805651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08a59f9a4dcbb5f60bdb46385b17a980f256fb1519c0ada117d5cff2817a8b. 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/UK6821805653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a812804b74a13dac2a0cc1eeeb3a0f22d2305eba5b311fffc6b5e1c46428aa. 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/UK6821805654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f8009c88c0d4a178d1cb428b7b87d9ab369cce76625898c0b0e037fe9fa1eb. 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/BEIX82200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430ab3b71a29b2aa330cf785cd37f50ef2fc29dacd9b99390cdfb099a114230. 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/BEIX82200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560398e607cdc884b9419010b446b12131203b99ee069821d6827032cde7e759. 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/BEIX82200238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891a981e00446422eaed213c4ed1099cf0029cde1af30edad55e73639dd31982. 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/BEIX82200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14efa4284da37d6074f54cd99d3b562d05bbf7d33bdc532c39b34a56c9678d0c. 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/BEIX82200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5689817e9eaba92dcf886774c39b9395592edf49ccaa2dc5250c9ce27aa04e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BEIX82200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92941fa887023a3c363c1c7b9c841510b689b5251499556bc949d476327c410. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BEIX82200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a073feeef44b42cbb3b60a4280438c749f9d2798e4fbf172d458c14ebfcf376. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BEIX82200243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9242e0f9e31ff738da4d7bf0a04e3a875167e00f00c38135881c77d82d88daf. 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/BEIX82200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba126e983a196c02c156c6f4743f3cd5932f2c644ccefc93f52ecb893f8e001. 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/BEIX81900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378fe5118a705daa282d1060bf2433a01fa934aba740bc76898fee8be1eb075. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BEIX81900096.