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 0xc7a0fe6a8e693f71b8e7cee180bda54525b789e532697cfe6cf0163c49b0116d. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5d1c660-d6f5-4350-8d65-6ca1f3881772.json and https://artists.proofprofile.net/proofs/artist/f5d1c660-d6f5-4350-8d65-6ca1f3881772.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 0x6ac57176b2d0a8b06ead800a52c3e51b3fd70676d6e96e5303cf4d6478fe9839. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCJPD2578235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e590b45ab513a979065b3137f79bff1bb75dde190f10ed7b6f43b135b4783cf. 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/TCJPD2590158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeaab33befaa53c5a76b278a7a9ef49078a65e5e2bb05f68588066d01f9a3cd. 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/TCJPD2592292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeaab33befaa53c5a76b278a7a9ef49078a65e5e2bb05f68588066d01f9a3cd. 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/TCJPD2592292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeea0621f4c0bcbebd6c83cf6293316faaa4694c9a2faa72b663c4a31222120b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPD2594454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832c78460a94359f61f7353b90749bcb7e5c49d2c05b82dcb68f625150336d5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:01Z), 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/TCJPD2598325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b3884df978d742b324df13b2bce0dfb57c55c46618e89dda4db9d14618980. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPE2503288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7dfc01930e7c2acff7ac062aaef1dec8770d31960bd1254f9c0cc5a801950a. 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/TCJPE2537002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcc73d5d384d4c28932a37b8473ab5c43fe7b314b0d89f389a2d55cb17e6199. 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/TCJPF2524512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf078f9dc350a458b870a36b8f476e53b5eea3c1fbf9ca6e51ba32c6acd6176. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPF2558514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c4e04f03a0c3c60d7d13ee09d975b911e3d97a4a816662a426849c5470f57f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPF2581698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51066d9ff0079dfe2c9fe9d7dc69b49b069e8d9acb95fb528563fea28244639. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:55Z), 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/TCJPG2580864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6dac0a16bd5a80def9251095e6d5d003e8a18bab87b2885e670ad9c73d4453. 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/TCJPH2509043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d5bdb00e7c7141f00cc63f80eefbdc1f7e6fda1470b1b851714ce70706794. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPH2539281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17b6372829cb0b6e905335687cf37211530ee873021ac60da1f45599aa81ff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:04Z), 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/TCJPF2524978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3996a21f69b3ad3aabe840fcd612cda981844e51fd904e4342a8f88b90577. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:37Z), 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/TCJPI2509617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa5f26130e7d1426766dd89c41717aa739a00e57b9c04f7949f396b6faf632d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPI2524760.