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 0x3134e292b5cffd80fc94a33df09c5cec61b1c8a2bfa89638b76b292d791bbd57. 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/36ee2411-e399-4f59-90e9-16779740751a.json and https://artists.proofprofile.net/proofs/artist/36ee2411-e399-4f59-90e9-16779740751a.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 0x2a5fd6070079b52f83b02f88d5a2a8fc07a1de2c62a8af554831b90c6fa11e26. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BKSTS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca967a31b0c2091c58a9097818152ef2d7c331f70bd90d10a20c24fdd084a69. 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/BKSTS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a78b272228ee6fdb8d0b359e8ab1bd23a5c6a0295610a72d44432253a8fc55. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BR5SS2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e238fac2209837e6701f2307ee657b270ee47aef1db637828ebbc19620ce13. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/BR5SS2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84969eb5c4cc5e14feae9d1e18f271a854fe5455e60d5587463876aade56dcd2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BR5SS2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cbfadd8baaee047220fec496e9761567fd883422aa9854a7bc1e14ee0a9660. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BR5SS2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae558f66d4eb3cdb548fcd9b13a72517b6355bf357d9c84b6e67b8b2c20b733. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BR5SS2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a714404c9c3dd1e375c830a5241a62d8a0ba30b157d5af31367c72ad061c7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BKSTS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758386d2ca000a1955cf17102511a0494f9075e8033ccd89bbd56ead0e19c23d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKSTS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc165af2424500ae8d2610df890cf935c7ff92c09abc9dd1edf4a840b968b5931. 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/BKSTS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568429f462ae2c60a1fe2f4671a8e7cb6c4f0c1638980fb545e1373c788fd8ce. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/BKSTS2500002.