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 0x9daff8fa6b976d5833846e555bf0e8ecdd5755e42844f59fc3cc1c55dbd3b6d1. 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/1e81be16-6d73-4d52-bf2c-66ba696bb7ad.json and https://artists.proofprofile.net/proofs/artist/1e81be16-6d73-4d52-bf2c-66ba696bb7ad.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 0xc2d39cc221bb7c3e8cece56e58fdc35427d3066e6e2baee91519252d30ea3bb8. 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/QZDA41930724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa308b80a3dd2d3c466001a337c47bf31acb752869238c38c99d2795fa3d4a061. 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/QZES81946895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b270056bc3280eed683ad917b6447b1462e8e9357a7161aff3578929b64f680. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:18Z), 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/QZK6P1972419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f49e20426a5cf58da9b96a5d2fb27b3fe5ea3bb1f8dee1fb0133b55cbe3a68. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES62018761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464bf9b9d1515f525ec48ad30320900e8924c57288b121007e3609754c8b5094. 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/QZNWT2135817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19623c0da5ddadfb39e6b3404e863b18589b82531b121e21c84c606dfc5ae3. 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/QZFYX2250552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6cb8b4a58835c1c7a3566e5fb9e5ffd0774c7a81b1db235a34763024a38d71. 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/QZFYX2250553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5789379b04af3c17ed4a0fdf2a87441f51829070843a876af00507daa69a55c2. 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/QZFYX2250554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f214a5bfdf2b1e57c994d428be873ed55a611ad4e8e69be7d8bdd1a78a9965. 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/QZHN52203669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9217db12781567b3a0d6cf46dd744e134134509857e390a9257f1c75c2d08162. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:27Z), 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/QZMEP2259092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57e896f64fdacbd5fafd9e08b547103004960a33115b44a3f85b52abdfdb94. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJ842004382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ca530a1b32a6d92cd0e480fdb4dd4671b7c381be7013e25134d43499a3d4b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2331919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57e896f64fdacbd5fafd9e08b547103004960a33115b44a3f85b52abdfdb94. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZJ842004382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b056a91697760742214e292550e74ee4008fc0268b4eb77fcb82bd697a4082. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMEM2559849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487b492c426be0af5b98439f64e591782bca3056163d622e4b3f591c1ed347b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SGW502502306.