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 0x6818470b514bb52ae23ec6ce9cd3a48a5132a42c926eed5fa0c0e91490103b9e. 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/d09881e9-284d-4528-abf3-196e4b797249.json and https://artists.proofprofile.net/proofs/artist/d09881e9-284d-4528-abf3-196e4b797249.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 0xf8a974cd429af9184510465d70a034ca33aa4c38baff8225e016e54f028c0861. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/ES75E2413675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7fab1ead0ba4bddc2b73c20d585fc70f1f131476b3488959893da8e8c50365. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/ES75E2413745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc529531d5f4b7e11fb913823b57d923179fe3c78cfe6788f59ce8d2aaa0c75a1. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/ES75E2413750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa05e95d1bba14f01c5ea0a88e6e3f2e593bed02217c1ac0f38d74f1a25dde84. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:43:08Z), 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/ES75E2413743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f273160f8e249632e7d46643dae2c0e491bf62e9e7c7c220b493e956c0ebb. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ES75E2413746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44544b2644547c7225555f65a8764e3b8ce0042937cc1b0ae1c64f029dda7b09. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ES75E2500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435ef767998b8976da56b5b68f08849641eac3eaeca590ef6ee8ca16bd607b0f. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:44:18Z), 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/ES75E2500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a10f00b5102e391d803d4df3b72b573f1b49e4082c324e6254ccb8ba65d040. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ES75E2500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca20ad074f83834197f3ee911b4040f9094fdb4ab02d97d1f30545c64b4d85f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:50:37Z), 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/ES75E2500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fffa4e04e82310cb3b7145e2599a6afc70bf0814460744ed990e21668626087. 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/ES75E2505124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b5e046ea4ad09af97e748139ba52e6d1736ea20a9b12b0cc2add26377d4db5. 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/ES75E2505125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a5758d0f3687340d52e849bd67d1bac997ecde24fb40b41dafb48c89b2165d. 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/ES75E2505126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b56a85610b5c486e866a3cd9780ceeb270c86f8b1ce4dde8ec6f4285ba9e8. 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/ES75E2505127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e794540a86e69e99a9972331fcaea82255f78e36c30a9b6696fb480a64ab3. 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/ES75E2505128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff1757c49bb4c43c43536f3766584a2c6116e2af668c714d866e497828019d. 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/ES75E2505129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4594ac20f2c841fa8f6ace8b53913b1cfb78faddcdb0b3caaadc4f0aa6fabebd. 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/ES75E2505130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa6f67b5c7c1a28f62287002ee37fc03dc324bcbf7e527b6182a13344adaa3f. 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/ES75E2505131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a2bd8fe97faf4421a1b48d038831d3fc9fb1abf690296395d9d01229af7f7. 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/ES75E2505132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ee5df2ef65c1ab92170d65546d0ed0c2d63448dbd30f46df8d25824fa85d3a. 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/ES75E2505133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c965d9cd1a7e49a732d908e5e15313db525b9d98572a1b99ce2c8cb7838099. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/ES75E2505134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d5c64108255bb700b1d523370cf43a4d341ec4bfeab5cf673c66007ac1da62. 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/ES75E2505135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ff91d6fce1a7900349bbaba98b9f59866a966d5165dfc2f03624c3026a6fd2. 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/ES75E2509365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc01ef15400dd285c58c3918e11df623eaae919b3f4990bcfc5b9afc44e20318. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ES75E2509367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eae3bd7f777b9ff3ef067b7a2a6f8182a9bca4ca62973d4c8e47df85073f1d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ES75E2509373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bee96a5eb21e1f829c09c639fae01f49e01f8cb24824ebab091798c989643c0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ES75E2509374.