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 0x450abfcdf27368edf8fdb6e0156cbb07aa5fafc558506538adb98b605f2dab27. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4403a5cc-0da2-4c3b-a83f-93183c56497e.json and https://artists.proofprofile.net/proofs/artist/4403a5cc-0da2-4c3b-a83f-93183c56497e.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 0xade48959f9f416af5c634bf6f9eb3f5fee1fa76acc3819a7fc2892a73bc52b07. 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/HKG731645561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56eee66fefe888a32a8611b577e0cea4a0d2601411ddc4ab9b2030fcbc9b06. 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/TWDL72104290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7d0129d18ef06ec80d92efd7b61f0d201795a16ca14bb3f334ceb84a790f95. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG731901850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d9295b98c7fd91a372a3a40105bc3f0a426fe0525a36749ab9c647c8eb806. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG731901851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928b41345b61f86adb5190d8c79ca7aeecbbd4b1fe7dfdbf351f4d8323a2cbf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732016092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e51272f26b23c591fa25f38f5ee14aff4bba1ef43404a8498a8c00b2f176a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732016100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e7688bd55d6a1ffffa660589f851435635ca7c14836abb4c6ff6ab35c22ccf. 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/DGA0T2410473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a920ae256bae1d9c9ce4c447831d8559a272c07cf5d956e219ad5b9566edcb1. 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/HKD012387555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a80065ee8bb04b2927e6c997e3a60ed389f66facaa78dcf1c721d6e46bf9cd. 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/HKD012386768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ab9904eeb625acc9e8ca54c4bde5434a37150ec045f5052a5b2f502b1b08c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKD012389613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9299f85369efaff308254fcf4f4eb24abaa51562130af9f0c8f5c54982c8f7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKD012390990.
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 0x9e1d900eeebaf9c3438b9c65a8b1559ae5e52dd906ccc2fb902a42b40a91564f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKD012391537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2644e212f2b27ef7038a934bd6d45b7d5cbb6cb095c0f2709a32d472f43e7b6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKD012392688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ea8726a4f9614b18302220553876ba7a7e8d0bb48c080967ceffecdb9d228. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKD012393043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c29bab98a7aecf4e9437f295367deeb9e2b18bf861b6f52d9aa1101204e162. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKD012377371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a47e81cca66388ce576ab74daa20efa78abc7980363b83d11bd9cd2cff24e4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKD012377396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc9eb4bd6569e313bfe27bec2963f9c69dcbdcef7c8bf6313a6037d0aaa1a4. 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/HKD012387346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b923022183a30f0e5fc6c8b88a482211581e3baa8bf16497dc3be957c9131ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKD012387240.