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 0x0279083759b5b42383e784ff607b189a8d669f58d7804ba0f97e5ff7b4d7c18f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df9451e-5c25-4ab1-99c1-ff7d4466a77a.json and https://artists.proofprofile.net/proofs/artist/4df9451e-5c25-4ab1-99c1-ff7d4466a77a.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 0x68b5497a2909f5b37912e8d5a67306422dbfdc0cb25eb793456026952f1964b0. 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/QM42K2262212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1059fd5f2d40365dd8dacb4ad2e2c85169a5cac03b2513a8865879967cfdf80. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMHK2209451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abbd2f0837898def0006f2a6e96b1013acde2017568aca2f8b87bdd2c2f429f. 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/QZS662221622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8f42980a94f13f442bb92a7d5527bd18c6c40b28e0be6c5b4514e2abc52ff9. 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/QZMER2415563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932dd889bd48e29ef3fdd0cc3bb45d9c0ab883286bd08d15045b2f63b14be624. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52591855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac1371d75fe3261adc96199b98724cb4316408451f08d11b1e6852e2c049336. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES52591856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a54c277c1fcc086730eaeb0edb327548c0bb0b49911aad39a2e1d84352edf9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:21Z), 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/QZES52591857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe290194eac91d5b15c73316ed702a6c1658e14100f8c26196ad3eda50b418fed. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES52591858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c934051967352507387803cc37c56dcc1f75af0c0acebafb0f0e1cd4ea1c4f8. 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/QZES52591859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3f201916b5c4512bf79fc79bbfb44444092450aba9c4b12d3547df3f7b289. 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/QZES52591860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8685c1c00077a1f9f0f5593beecefb41296a30c64b1f9b6e4e63cbb6090748a. 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/QZES52591861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d674587699aef85bf8e7ab1d53689cc22e737042bab51085f3c533136d5d488. 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/QZES52591862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37985a2968943850bdcd405f4a1f5bcb3a54e2cd3483339d0c7240af471ee8c9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES52591863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe147bc33f934514673df8f5e4f481ca1387dddc3eb2ff5fc85f573b4a20af903. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52591864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf662e7b61cde4c7db9257f0c427672af1698d8d15de2d0ac8cc4a1de9af50439. 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/QZES52591865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884adb6c2783824e19d2e57e925031dd7ba86c43bd3247c8c1abc21d8b3cf849. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52591866.