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 0xb4d3f10cbecdfeb4e221ce35cd665dabc1ddaf636e166ea5d2b93dc0d8079362. 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/da94bc71-1d74-4439-b665-32a32bacc104.json and https://artists.proofprofile.net/proofs/artist/da94bc71-1d74-4439-b665-32a32bacc104.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 0x6af61c4d432614b3ef7868a6f5d56b375746b502b3557eb5a03c98ecf83f6c2b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:45:54Z), 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/GX4R52292843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624efb4705afc95894e00537dcd2ec2099990196c22c2a0e380a6b152c865b28. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU8444959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c74a2a009ea95c8a2eaa16f01732e19a98df22104c0d8eaf3130edf20b1aec5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:13Z), 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/GX4R52292844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55e987784ef4a813781933bac6c2e57e93db6c24b1829c479973ef232275e7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:19:00Z), 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/GBSMU9606755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5094afa7edcaff20d1d75e4a4388fd90893da47cc6bac1ff6311ec49ad5ef98. 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/GBSMU0103859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed839ea90d85f98a106a62af7ac6af8b53261823d32b4a285af9758c127c0ed. 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/QZNJZ2281486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc005c8d5040739d1c7c73eed6eba0d7b4328b141ebb61c4ab7844655b37ed173. 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/QZNJZ2281487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4fe8aa9d8e0d51ea97d50094a4e47b9bea1ee1180bc6311ba27cb1d4030899. 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/QZNJZ2281488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234b6f042f179627a0aa17d7e4eddf2fda75154ad645d283112ebc08f72f877. 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/QZNJZ2281489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948c58e0688413a4b454fd21f2a77c606be82e1affc312eb0da9df1727ba1d3. 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/QZNJZ2281490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c973658e2119d1813bc1e0cc1882d327d7b70705d68535fd2318a2c93c7536c. 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/QZNJZ2281491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb446f3b5760ad20c886202d56fdaa25b8d4c7098ca91fb22b0926365198b3312. 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/QZNJZ2281492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9cd4082754100c41358e4923d09c888fd6b1867b3de7b0ca69bd58a964a50e. 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/QZNJZ2281493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd03bb4b132624156e727ade835cb2da29343c97a5efe39fbc5660c3705e40. 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/QZNJZ2281494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087c33cba7c92f58025439100fc932ebae1bc4eeb0ce19da8447531cf36f44a5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJZ2347254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda124fe2636d5de1edaa864b779bf42b5e4b73147fad2198770e6cfbc29e254a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTPX2376086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b7d5881a2a89022c116548b1fbf59fca6a8998dd7ad971bcee0ffd9cd82483. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB2479905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c44ba7978ae33fda413ed18a0b334d02de6fa10fa59c7c509f400e880b87af. 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/QZGLM2506745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e3bb51bad490f0db5e03f3e6f13f8ad322a92d7e0fb05a89114233f570610. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:21Z), 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/QZGLM2506746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc4e747d1b345726ce8f3bb327411527dfcef2cf6f4100d55fb9f545534868b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:15Z), 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/QZGLM2506747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89349222b86e34ecc2a9ba6bae66bda885b9afa05189037ce7b05d1ecd3ded30. 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/AR3692400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722849f0d2c8b6d8dcf60b7bdbe36f72a77d35802ce87b2b283c32a643b1862b. 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/ARFTQ2400004.