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 0x6d27af85d41f14352f897b6b1b6db4472e7db9d544c06417052e535a18b1e129. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2637da02-8e2c-42c8-b6f6-5e93e76d76d3.json and https://artists.proofprofile.net/proofs/artist/2637da02-8e2c-42c8-b6f6-5e93e76d76d3.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 0x984057b890d3a91e457ca287d5254a7329ab6cfb33cc5bd2a59cede05c974bb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC061908562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c77057088f7158803d185c8f3585e8bea5b8b6a879867de8537ddef80ecf0. 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/PLC062114207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb05171c1c73c39527b4f655a5c84c3c668773d6e23d3e688c64afd402d2226. 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/PLC062114208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d03a551fc4693d62cfc2b9011613fe02abde68ec75be9df418e525ef7b948. 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/PLC062114209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616afc285443301d86ef72e24f36a2a023411b4a4d85a5da67e2793040fbd63. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLC062114211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac7724cafcc1d5826b31ab38bae788ee3eaaa4d8bb58ce725cd8404ed7407d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:44Z), 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/PLC062114213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e82ffd0dd727749f69de8aabed269c125b5e1312fd7b0b93f46dc60af8e515. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/PLC062114214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75deec16627c95cdf172e4137201383d3e08b0078716dc8151c9feedb972e61. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:00Z), 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/PLC062114216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8102225b09740af3bf9538c029cad714404d0a6f79d3d720e80bfb16a8bfbf2. 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/DGA072156463.