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 0xff66d1477b5c82eebfdcb6fbcda9b08bf260742931b8ab4ed60b7896e3772240. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b450bc1d-76b4-4a44-aec1-13bed2dcd16c.json and https://artists.proofprofile.net/proofs/artist/b450bc1d-76b4-4a44-aec1-13bed2dcd16c.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 0x5c1a98ad410f4fa1af9d7ab34dea0942fcb617f9f76e520382f67b586f758f18. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:42Z), 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/QZZ7V2525235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7483190a6f480f055d853268bea3850dcbfe5ea23a407e3c3cb282e2983bfd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:44:39Z), 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/QZZ7W2524591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc90a6f39472574dfed448b7382a7fd9288976a3593bf88067f0bf7a335f1400. 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/QZZ7W2524597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f331e3dfd22ff0820d90b8abc95846edda0e941ac24afa613442f6f8d991e1e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7X2548438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e87e486885b8098b26fe9b2c7d51dec47427546f14795c9c8dfb681f1783ddf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7X2518968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab644e2dc4de8093951ff9c2d86959d7ffa0c0e1723cdd3ccc63ca5d5a44d1d. 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/QZZ7X2518953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4215f24b4a3fa61558ea05e1f5b9dc204452640f9ca6834dea0966fb221ee9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3EX2524957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212fa678b7608d71186c0b1d72a0993dfdc85171bdac3df0d1eee23d1df299a4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EX2544351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2601d837bc03ca472b1fb8c8b59a050e8aef18cc61bf320ef44634d7e25e6367. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:30:19Z), 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/QT3EY2538982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4918af2081176efe1dc05173c1361e259da2dc1e124469c931576fdd1dd59ce9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:40Z), 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/QT3EY2538984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ace6ca7a8af179b8ee4c8cb9a3bf1952623b7c8038119317405c170d6871250. 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/QT3EZ2535732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98837339e6313be0be2d4de52b604bdad4348ad553c9797627f8cff3456798d3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3EZ2535767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23076264b54148ca3bbfe6eb729aa170733b377a792fc03973b8e0c6afacfa8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3F22548933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec17c76857cffb49afa5928dc5a42a23384b09e43529a1c35fa72bee9dd83b0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F22548927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df12e0190ed50f1b98588bb5b6d7a88239fbd8c05df7f0d0b7386f827b75b9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F22548928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b744ef0325d2e4d538eeefe89330bc079255cee52d5f590fbbd32b042534cf3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42566686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449ff5585b345b3ce5dd17e14efdfec02e83ab9ae08ed78f5e5563441e705b8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F42566688.