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 0xc6641c9df6db4e089db0c26e743414ea8fe2b3a9f08cd28c36b7cf2520d69fa2. 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/af9019cf-231c-4fdf-95d5-07f3eefafddb.json and https://artists.proofprofile.net/proofs/artist/af9019cf-231c-4fdf-95d5-07f3eefafddb.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 0x06d68577009bdcc3116844b2ce9933a97569ebb8500d6fcdfb37193a514ac060. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:46Z), 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/SE66N2261209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae0212b379011afecf0e4683e1880b506b3b7da0bfd066e3da49f9665479afe. 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/SE66N2261211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8355bfbdeb33497f8147445545f659efc3c211ad0fcf987169c75ee4d7e570. 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/SE66N2261212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bf3110296455e2d5232b04035434479067808bb143f9ebe44328aac477853a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE66N2281042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346d2b5c298cecdd5c0be72ec3ffd000d4619e2d9c85974e584cfbf90341c86. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/SE66N2281044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71084036b787ebf818c92d0f94d7d08fe9ba70e73b6237401ce24127da14fc8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE66N2281046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c55fffad128e4a2f3bdf0294792f1b4bfecbd7ddaa2645aba4fdd29de54fa. 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/SE6XW2378072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cdf9f6c2f1ff842ddb969b36747b038ad315954e764a433244e0a6cb28cdc4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:11Z), 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/QZMHK2339694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f10de2c3d93ef548944bdfa079c246cbb611a4152d72a9e144b54440f371ef. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE6XY2345571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f0fcf72ca12892e7b1805569802dadb047a6cbe01fffe945a058dc3531fbc. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE6A92334456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5f11793e4fd4920d71824b2347943475b619e9839fe68fbe647e401a80cc38. 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/SE6XX2319543.