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 0xce1a8dd6625783ab62e5661c9ae72e147c7c7f6aa781e348cc9e9b27a89a92af. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49ebcd12-d72a-4e30-b395-472ef1905432.json and https://artists.proofprofile.net/proofs/artist/49ebcd12-d72a-4e30-b395-472ef1905432.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 0xf8cf6e1735c2a80795d9d68d8e41be6461af67d0c08ed1cf17e9873688d69103. 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/PLC062421276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f816d102527de63ef4361cf731985b2103b80968079eef8e084d34286bf975. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/PLC062432006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e1ab7df5eb7544d42ae8068b8b3aecdc7d4b6d1ec6d398a65eade228bc09e0. 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/PLC062437666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99328f365b19cf858b06755d2cbf7e2a8e3d591b037dd2b388735f134af654. 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/PLC062441007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317369d4f42abec1ad82c1896db7fd0456f476344cbec15071319245c9408fcb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:39Z), 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/PLC062500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b17c5f0113992b9bf6a6ef9771b382715d45b8949f988a1cd48bdf80976431. 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/PLC062506338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ce378a6d64f8c171f45e0b301f88c19a3ff3e7b9eabac318eed0080caa6eb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLC062513264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea965ba95fee6fbc666dc8a7405a09e510d98a2927760e9d8300cc5ea0c4b47. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLC062521424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb625e658057622147d2731e122800696d8a68074a91cadefda9041fa1fa0543. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:09Z), 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/PLC062525324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e450bf90c0feb30d70aa5251faeced6e7d2a8e77c122ac947a169538e3ac1e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/PLC062530250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d044abc2676cff3e53fa86b500f1125889f0ad723752de794846448333bb2a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLC062536866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc134ca1c3e7d044850172d7be8fa37729f37a198ca1749e29ff1451ca1493b0. 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/PLC062541882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb063e7ccce16986a9cd81d71471a82f0439df89720300b92604c1d017f41c21b. 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/PLC062548827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e076e807b74896a940cb38e5eb13580655bb9f73867036465f7ccbf92b12e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFQ2410062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa131304980f70b7539476ff1140394fde6aa8672a284c732a215b0b10a69e965. 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/QZWFQ2410063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226dc310e34b0c0dd6c24adabd1fb5e036f18ec1215ec7d18685b8cfe19970f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFR2455871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f6a2269a5128f985a5773c683032d19a84d7d872f6406ef0cb18e204dd6b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFR2455878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed362239927a53765e5cd4f332b20d7d46bc1caedd66040f4f0395da37a8c4f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZWFQ2410070.
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