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 0x7efa905201f9ec697a6ef28aa5d978df996ca21251a03fbfc635ef35785968f6. 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/fae904c9-622d-4508-a443-6d2f5213cc4d.json and https://artists.proofprofile.net/proofs/artist/fae904c9-622d-4508-a443-6d2f5213cc4d.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 0xc32a7a299bb108dbd0f42ce15d98f3d2e498208e66248cc7b5443947303a89e4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZGWW2047772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04636dd5c66d88123beb8f2f428bc74b6fb7a7ccbb7c1db5a83532601b0f3b9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZGWW2047774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf69192e1fd971abc37e8e31edc4a3132478fbf67a97b18f2b59ea40bd511f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZGWW2047777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdef4e17ab4b39cd2a68491dec82878609c5d8fd015ef21f895d229c42b43c6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZGWW2047778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b50ea64af37ac0e0ac84d4630bb94573495b17eb7101219fbaa26cd4cfd0f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZGWW2047779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5521066323e27fc13da5dfaec1215666ca64ac3058880a0cb45d1c95c251e711. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGWW2047780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f822558aa9c48a30f04d3fb571a8f389a3ec1754d3320fd1e91c5d45844d34. 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/QZGWW2047781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b8cba300ddeec996e323a9dd4b87fa066a6177e5105a00b8b78acef913231. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGWW2047782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c30b4f58cc12b52eb1d09db7ed2c5422112a1069450cd8c232badb6fd7bd85. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZGWW2047783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b94c4974e74735ee7f9003cad8420dee587bef68fc12c8d599c0a9dcfa9b91c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZGWW2047784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e50f06b490edaac527d431179429a03948882da73e59181e8efd25fea3624. 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/QZGWW2047785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0226d53b1a9047f4313a302ecbdf8813d79f8cd4089649e7574491beda3b0e41. 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/QZGWW2047786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb6b6d2c00f0f2063c2c31104247dfb40a83cbfb75f3d3c6e7e54251271e7ec. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZGWW2047787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691792f7cafbc560b5da0b78b3f2ec72f0aa5a1c342416270d9233b73d9e929. 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/QZGWW2047788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffdbd5618c29122b86f3252768d9be350efd22191b20fe874be35c8b236f611. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZGWW2047789.