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 0xde442903cc29bfc590a40f2d0c0c950d4039e4c4bbe76eb9fe7ac59bcbf561aa. 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/1269bc0a-903e-4995-a588-29b390954265.json and https://artists.proofprofile.net/proofs/artist/1269bc0a-903e-4995-a588-29b390954265.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 0xfc16d14f2af877dde42f6b07409b4bafbe46dd28e1cfa3564db1ac82212c29bb. 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/QZWFE2320761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c6f9fed0ae12e3f6448bb7efabfa5b2aaf03ab81f2f1c80ae841e17d9128a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFYZ2405566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bed6544bf62281adfe00b6f1bc26d8397f317f2cc190aab61cee664a073514. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ42472636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9d9f89a8f036103a8abfe23e009d13834f56e54d443ea317f7a74aeeae9b9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ62454627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5ed9746b8ce477176f83dd5663d6f32c2ba645a705f9562477f9bfbcf37dd4. 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/QZES52407381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb9219ea308896bd4dc3594ce560db32fff30ffcb4ba726405e1e468c28816. 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/QZK6Q2497593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae40128c61a4985438dc707d2a537e903a374e4469dd98895ba19023e059be54. 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/QZK6J2469648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31e4014afc594a987a7c21d22cc42ea9dbd6b1c0346b43ea38546712511975. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US3DF2464220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b626650fdf55c3999ac6468213d8b04370abc201041dec9b9f3dbecf8b3462. 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/QZTAW2454953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92021fac182f7b6aefc3f8deb8686a6a491b3757569394181b6950e3db1dc16a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB32407853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193d96540440c725556bab84f7ec3d1b4ff93576bce9ef869b8cb8cbcf8ac55c. 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/USANG2426983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f73b74d43d8f820b97dc55edbea74db1127a8116a1070134ee8755ef129e9. 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/QZTBE2480052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282593824bbd0f90be23cd57ff6fdebc79c4c7573a777b476d38dc37ab70b455. 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/USANG2456423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad579f75f8faee38b3f6c50eda39b0e8a0813d8ebfbd9dd686f13e726a0febe1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZWFS2447309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc363096a14c15552795a7c013b2fe9268ad32b63aab2ab04fcb7a23d9be473. 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/QZZ792442685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630abcb5ec9b1aa5646c47de4548284921cf3af34b803f6b389b094b4d6c0104. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ7U2432238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954e26e0e35eef5e4d7f8c1a6646358d833ab94ce1b1e92dfd18d5d29f2fce6c. 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/QZWFV2574349.