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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc4999307c378b6b14165830f430f2d5af8c7bb1ae3153a6bcee293164d569. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f46904b-5f58-446b-84e4-5d9c343dd0ce.json and https://artists.proofprofile.net/proofs/artist/7f46904b-5f58-446b-84e4-5d9c343dd0ce.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1adab940f836aecd99e3463920bef3fb836907e25f06427fc6527e56c8dd022. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWZ2558737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedfa752adda524f332db9ac0ca8b4d64310cc74827d7503e39932ee0e6273ba. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWZ2558738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697ac3c9844a261360ba555014e7d5ec8ca380ccbdb9d6ab9a13120d705679f. 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/QZNWZ2558739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d78b8876784c527744fe525f33003229fc60b5f73be0d057290f6d1176a65. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNWZ2558740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561aa1b40967f14d0000cf5b31b83915fd163536b4438d2eb6025bf0a63f09b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNWZ2558741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84e483336e453b012f42d35fc7768dd97964f747bc887b6dbfa23b45e445807. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWZ2558742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb9b2c934c0d22a74a6a22e99f2208c9eb2275666c7891a6c9c959c205634b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNWZ2558743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7525bd22d1d39b2d46628a1cd6e79254787cbdefbbed2978af9976f71a176781. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWZ2558744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca68369c69711e41e5aa78400e44f7bad872a27ddf8b5c7657ad702ae4bf6d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWZ2558745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f37c85252fdf42812c4611cab2dcd740fc939c0b54a3f711ccdd6ab482f64b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNWZ2558746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5788f6af878acfc203ea93f78ec052939b1b0316a85ef1732afe8601fe69bd9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNWZ2558747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf7a18f9f6dfc52a1584b49fa0e3468bf2b9c31978a3e2a2874f5006bba831. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWZ2558748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc456ceecc379ba1f98ce4847a84e1f6fd29165571adccc88c9efd1345973a068. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZNWZ2558749.
Even The Dark (Even The Void, Even The Pain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872e800c0d85f8aad897992f4a43cadc3c22016f7306c9c6f93db44a6ec191f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFT2570353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d5b86cfcb30dd9474b0ad56881063684a33377419a916fcce14dddbb1e58b. 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/QZWFT2570354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f761f7b50cc17e91f997900f2bfb26e066db8b6fc2d60f12e8aaa7408b06a1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZWFT2570355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe830b68cb4aed7f7bc2c227b2bd428216d6642a4b0b604c394de9a35aab1b88. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFT2570356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a04b74223c0f520cf9d739f4bf7b4df904c9f368a2d4c818ec2a3d7e8e7524e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFT2570357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750108ad0dbbd40cf121ccc610e4d3d47505a36cd1935e22f5bf6bea877d7544. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZWFT2570358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9704b202f4427f08091647d2495271e4735f179cbe91abde0fe5ef87299192d0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/QZWFT2570359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471606c041f76a5a748aaa7148b2f5b2523ad454faedcab3b907a3c151e949d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFT2570360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba869e4fc2149f71f01db1e730d6bb8c3e86ae043b15523a06e00b0e8242fee. 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/QZWFT2570361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5955705814c4aa582495e98b15b6edd48bcbb55440d77f2712b3cbb198650b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFT2570362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698a53a9c11eaae662c5e664dfb97867e6547447f1fe92ac03d46029eb225d26. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFT2570363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deaf1223fdbab72c4e328ccd6487966dfd9cf0f8ad24c3224b9ddfdf0c2c55c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFT2570364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9f3e1bbc6632dba5629bdb64b6a6a4b74509870a6344141a0b96c824aa33d. 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/QZWFT2570365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322277bdd751dc5405e97cc960a4fbedffea191ac43d2c6319b07ac14a1fe664. 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/QZWFT2570366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41805625c857833dc3debe0c51ee91b62e8e5e971c2f24ef8a1bb6d3945db40e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFT2570367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377e8d21466985967b6b692ef743cc674e9b85e4517351b61757e25f6c6e423. 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/QZWFT2570368.