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 0x46d72b5ab7348939633a6d19209d49f662031539a3c5252838838a66398f1875. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d5b8b53-84b4-4e13-bc55-3675dbe607cf.json and https://artists.proofprofile.net/proofs/artist/7d5b8b53-84b4-4e13-bc55-3675dbe607cf.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 0x356dc837715b3b6cd041a818242c594c7216e8c8d41010e7b9ff03ca6fab3620. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USUYG1169854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daf02219f3e54ea96a5f5c0bb3cf35dc4338638b7f873eeabb74aacd082aae7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMEM2095386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78db45a757a36ef30d5dbf093ed64196cb558973229e3d5ed834de5590e6aab9. 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/QZNWW2198113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71580d094d0d77f31f1625eb2c3c47cc77ba07195cfd070d702e855200f77f7a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:51Z), 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/QZTB42285853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ddfcded32548a4bb2c9a73d30ffa22b1ba7823ef51a1c97e2b1332b5c67abf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5FN2428394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cdb424d0c6cc7928f6257ba6ef9fd457fec3663602fb71a4b4ffd6e6e2cdf. 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/QZ5FN2470129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45b630d39ddc7a6981ce3c6ef99a3ca4a3ca5785b100ad4b139e9e91d52aafb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6M2431883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc62d3c1d65da3d051c3fabaa8406eed408f22a33a48dd784e6ba59c47ffab. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZT6P2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf476804154ae822570f3904130ac0a9b0e081ffa09077edce2cf05cc30b96f73. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMRTJ2400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aeee468be8918601e11952c2765f4f3c68000f626bad09acd89654e8e2bfa0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:06Z), 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/QZZ8B2466882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328cfb4d48b438008a5b4ae7276ada8eb442f09cb0db7848839493e56756117b. 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/QZZ8B2466888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f7e879a4c139404b27e2c85806ad21d1a0d950621b0020f31ee59b77929bca. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZZ8B2466926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe345476708c1a10d50220f784bc58de284d7061f7bffb8f5d59e7e7dad2a529f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ8B2466933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fc95a56a99edc2b3a7b377d5d2a423a57e9530328e11539f5ffc827a33388b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ8B2466935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc107040705048636215187b2bb86f227fd2d09bc9d55728d26f24ea65a6c556. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFZ22474594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e652d0aea1c701f0e41e6d6773e6792483d597336852bff2901dad29512e1a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZEC2460516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c4d387888053cc8ffe119a0fb54ad7180dca01d7a5a2b0f3a0803cab77d16. 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/USVPR1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9310a6b76e3cc5f30b63a3dba5246815052301a72be1a232d80fc83e04b6ee. 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/USUYG1286587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b76e85f063f5e50f0f7f98330781399a4ee1c4e6dbfadd9131f966d2345c6c7. 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/QZMEV2460507.