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 0x6c9c92cd0f841a9823bded06dceb1336320cee5ada515a60afd8f6a057061f96. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3988801-bdd2-47ac-971c-175393b8e362.json and https://artists.proofprofile.net/proofs/artist/a3988801-bdd2-47ac-971c-175393b8e362.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 0xeaba227ea6a5fc280f245b4c5d387b48c8be418800799788fc75cc02360ca829. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:36Z), 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/QZZ7V2523112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b6a2579cd0dcbd062766011b77acea16efabf63a8d925f021c1666ea98a528. 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/QZZ7V2525188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8181906c1fd764bd6067f66f5311610d8cc24e278eacc8d1f92aeb862d2d8. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:05Z), 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/QZZ7V2525200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b5cc29e27bb53dc4523bff3c8e741b4f70ee1c2677ef9d5cbe74d27e91bc7. 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/QZZ7W2524590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b940f3aa6354cff4be37a78867c1028d7926c245753826ad83b00f7263c44d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:28Z), 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/QZZ7W2522124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6638cfefd942b98a31bf03d36d93e0bf853dc247dcfc5a28d06340a3ebd4952. 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/QZZ7W2524588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80390929e8848eb139e2435e785150126d4a3e10b9ad4c757f49215afb05de78. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:18Z), 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/QZZ7X2516684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179a7c78b56772e89c12b029c08417afc438f2574a4eb0e285a682b0c94c1dd4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7X2516972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf510846e4bece8ea9e713b8f16c948774ba5b4a2fe49dd740db5ab4a6582e44. 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/QZZ7X2518939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44b49282955c44ab8a51bca662c8abb3d1cadd1323303a4b6d846ab7ca1a41. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EX2522170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3882cfbd3f8838673fe4ce648045dac321c789f69a63fb449e944dcd2c818b. 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/QT3EX2522683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2184ff0d23ebd910901042f29fb95b42eb6484a0110dd6bb59e5bd43062316a. 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/QT3EY2535891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910ac3160fe2885c3b2150288f0002914391dd7a9a143dc2238d5e6d329abf0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:27Z), 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/QT3EY2538980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd387c87a365e4d4ec68fe43a4677c7a90b6b55ec61f4bf908909f8984211a0b8. 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/QT3EZ2533488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa099a4583165a8b843e3ef69d747b443cf01ec18e1ad5278bc82961b8380a837. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:29Z), 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/QT3F22546084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71cbcdc31f01265e40c4f7c36553543daa8cb926f8ee852b30637f952389e28. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:35Z), 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/QT3F22548915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fb870d9174cef75f1d0a778253a22e88612e4830cffc996a4dd7814c4e3576. 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/QT3F32565217.