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 0xb411cb30c01a37670b2179d86eb3d7e9b86ed0fe71c98cf369e1a6718accf9ac. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd619eb0-67fb-4cec-93d9-6b3ef97cf3c2.json and https://artists.proofprofile.net/proofs/artist/dd619eb0-67fb-4cec-93d9-6b3ef97cf3c2.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 0x5a20a44c6ef61d17070274baeaf2ef2db67fcf99673d9887565b2bec78daa5fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ82088870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8694c388d04a91a1b4ff98130ae056ecbf583857ce7931bc551e6206e821a1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DELJ82088871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6c85c44c1034f5f738de8080c633b0f7d10fcc56079e073839fcee2196bfac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ82088872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0730d33228b85f69a80edfc53f5f64601a42642f1b0036cffb91fe6d53c73. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DELJ82088877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5271bfd4bcc0a14f34ed5930e93d5a5159baa96d40214a4db69f655af9852ec. 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/DELJ82088878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5651104f6d45c2f3bb74a9da6bcf3e838337ba02e6c51ddcec79128d8071ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ021804025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6bf950fd499d5ba8a5d3791bb20035c1daa56dc5563420ce6c37dc0d81059. 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/DEQ021804026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376de5d0393791fb27a748428e1e87237449d81ee5a49b09da993c772cce3a0. 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/DEQ021804027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81af5f8874de0871fd662360a8023f0c92f5c8e42e8f01639122966515be3b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ021804028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23da83823aa398ecc54c10d92bb3f9ac768a43d01fc273b2bba85dc1a33de77. 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/DEQ021804029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c0bf08676b9cc676eb5d6d425f7b0acbad16f3e5b4a7efb311d08da78f1d0e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ021804030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ab025bfe63873b0f32ff23bdb4f2150945ba344eae6d5006eb98c084e09d79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ021804031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0b13748c8484af9ac4c2a5644e34af062d14b4ed73f2a2464dd0659794b77a. 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/DEQ021804032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02918ea0ab4c402c6e1c8346d458e473ea1f083c236be3a037e0d650289e1261. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ021804033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc030e0ca10839d0fdacf4503720c64e2ee7f684f96490af0ff74f832f5b18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ021804034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1516d0136131443e6fd0395c7fda3ba040cf89f69f78eeadf53617f36dc1bc4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ021804035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac9c962e34c6033b959c38631b88cf345d20ce810f8d397b5a210e9b70ea950. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ021804036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb552c606c366a455e0d5d4c4e3b95df254a68cd0f23ec1c48e696690a54f598. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ81805102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a87b27bfbc5a7e7199419022b11bbe56029024091ca0a837a62c6a3df04cd6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ81805105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac2fd5bc16a1269949dc8fb64e13ebd75bb5f4305e3bd124bc53d85543201c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62186215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064cd6597f7d3d28a94daa264e3053d95741da5f427e74fca2c676ab196ae64b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742006682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90215f49bcdaca6054967828da88ca7b6ae915348efef44556d4f9a24645c25e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEH742006679.
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 0xd8ca60bf65697d9655d35b74d043c5377a9e8b1fcd012c542a381ce9e564dac6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELJ82074755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d142be8ad30bf39519efa5901d32ce2e0dcd1e1968bd8906e41cf381de306. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ81961483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4030cb000a11982e6bafa660dacea711e1cd2ce62cd189083ed0cb9b63267f63. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DELJ81961484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b23eb468f9bbdd4ddd51e44da62c87dcda4c4020496a5eaf8b006bb060a4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62170678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3f51d084d2f7910b2ee121fcee1972a8b361942dd8bac2437dfac06848dba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEZC62170689.