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 0xd296a6e9250eb9005898cd17585da5eaf4eb9d7529c4565ee23581838ecba26b. 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/c94a7b38-58a9-45ce-b82b-ed98b55147c5.json and https://artists.proofprofile.net/proofs/artist/c94a7b38-58a9-45ce-b82b-ed98b55147c5.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 0x64cf1b40a120b37590b0709151068bfe5b4a92ced69fd72c4d4977e5358c2ba5. 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/FIBAR0600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95fe4b3c8217671e0d56873f95cbdf776e523cdb381e306c97194212fab0c39. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:23:14Z), 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/FIBAR0700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4561625fa0bd04ad9cfebe1a67411652b208c1a1b58b2d7e9e617facf0579. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIBAR0700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa19a45cc10c3c976fdda50cddfb33822a2738f29b4b6b80c112da29faf10f3. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/FIBAR0800250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b90ce0f9372b9c14febe74d537aae0001ca294f33df1c8f1996f8bba48d5f3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:51Z), 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/FIBAR0600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be9c3274a61cf2db99e7f9d7086fa165e46f13f692597b65494cc79c356b6c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIBAR0900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0a45aa5991b6fae58c0afc2e480b92f0e4e3bf95361c7921c0bb66c9306b5e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T00:59:39Z), 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/FIBAR1000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaee146a220990f1acc96d977c5e9a356f6883e0469263806b4952183b54093. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FIMMZ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0648b7b6784fb9add05bfbc7258b1f7fdc91ad49935ea7f81de5421b58c19233. 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/FIMMZ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d6130953a8a61e7b64b24a29fc21709d2b4b2ba772071e6b3868c59a05be2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIMMZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85baa02d6a7272d7815aae1e87a496c68f0e1241f472a44b72459eb6e6288fc7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIMMZ2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09853da2ad2f9aa8c1335aaee7fa2abc4c71a47a32e25cb9b9b7495edc4f1977. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FIMMZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc6ee2f25d2d12587617275d3bdf28194896b1dfd41d2f0e4fcbc7e8d631caf. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FIMMZ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979caf63c889d9e164b102977e7c348167325fdafd0ef9bb54303bf80a3b8a47. 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/FIMMZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebb5764af159c41fbea6cdbf31f6fda1d04591a93f7d61a32dbd0b593b125c. 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/FIMMZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71a5a2691caddd2323dc4e858d95b53123be35a9a5c9523264baaca0459166. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FIMMZ2500001.