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 0x9141acffd343ca5a15d4f287ca1153b5a641d8cd1762b2bc85e61a6e44146008. 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/4ff497f5-7641-4900-8063-296b120fc9e4.json and https://artists.proofprofile.net/proofs/artist/4ff497f5-7641-4900-8063-296b120fc9e4.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 0x2bf660aa39549ffcdfae87ae526ff1690d6201cf3939e9fe5c065e26abb5c1eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCABR1373489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eafd62b8dd0e4a8958df8e2098a1470fca5555159c0f42238a446a8b77a285. 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/TCABR1376014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665e7e125886e399a271fcbf784ece82b031c38b205b63ebe61c64c71fc75c8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCACF1513381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d15b4d6cbe890ecc371010c2cf8e76546b726d2a9c2b8f7c605558552ee1d67. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACF1517856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20f80ae6c7914782266b89317343f429ebc19610756a04110a21a761a9be68. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCACF1517858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013b38804fdefbaee1d566cbe065b92a0e0fd0b026ff14af88552c1b6086e43a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCACF1517859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d20ef9476b49949b41edb4afd06d14ad6064a153187328f97c36ea41b05026. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCACU1600615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc9822035163e4ec9786e158f4d578a99daa5e49795e7a3177e97c1f205f95. 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/TCACU1600619.
I Want to Be Like My Lord (Walk Like Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca730df67aab619c3f9390fd8c28759f84abb9dd5ca176d7481260736b1829. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCACU1600697.
This Old House / Your First Day in Heaven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0225cbc2b553645894b834af80227caea91a8ab5cf98571dbc9fd9303b3f27c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCACU1600701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d191f947bc9fe62bcfbd1841d6ed095599d2c7a844237e46be120dac07d8e57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACU1600714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7dede6a2e4345a7a3857f873fe6dbe078a98841db8ebdc1a11ef04c561ef5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAFD2016544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27da294ad81a32dcbf25ab3fa877e1740bb38750be06dbd16f5ceed7a8baea7f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAFD2019286.