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 0x2ead8f71bfc0b23f0ba53fb660c8fe3547347384be9214f8d4820be2b0cc3cc4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deebcf84-13c4-4ccd-b68e-c3136c921e59.json and https://artists.proofprofile.net/proofs/artist/deebcf84-13c4-4ccd-b68e-c3136c921e59.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 0x5171888a4874dee3e6af8934e93b95bb15f60695b922b02c2de854ce25b99d63. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W11932948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a7030ce65febe1ea7fb8aad651ff60d265f8743662a2422c4f527a729a67a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11932950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e20b0e322303de40ee3fee14f1d8adb4a893be4fac4d19d5f1ba3503a0be027. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W11932951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06078d10e104d72e2dd5e0ed482c9338c3b4f9c69dec1819f943550677329d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11932952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2539810bb69e5cfed135a3e9e1578354a947ea5b689d68388ca350e078b3d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11932953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9790822a43e457ca2e1827261d31b9b81246717f13b27d32685ac2c2d6cbd8bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11932955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061cb11f673e4fb5519815fbf6261e7b7a34959d68d979a813bdebe4699ec56a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11932956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbb67d4e61dfde3d57095257af57e2f6abd0ed8662020fe745d2d1c2dab6a2. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/FR9W11932958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b95695f3cc1877f403024a0d77698a815b25a74236f14372c0f7470f19883. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11932960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a62e7ec3ad7cc9acc8504fe7961cc7be801456f0022c7097765826274d761ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W11932961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b9c6737bbc202683fdb8fb8063857af871a279eb152f45b4d9b44434e4096. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W11932962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b2d38b490d7e1f791bf636385d05380b7023d6883e0bbce19b376244e1ac18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W11932963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121659b92ae7c6bd5605562b52e4da179c9eef603c78f5b4640111873b0f317. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11932966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6526c9c70db90a2e971a1ae723c31b39126eddd3158ad55d93a3c418347e25. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11932967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6768c67028d683b35bfcd198ee2ec51a97b723ef820e5620a0da1f9e7f3e3b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11932968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504a7c437d0fd6e432f40257b4e9d8c52cd937ef5fc6300d48a6682a4514e4d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11932969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc763cb733644873f12f988aa3e6c6715c5958920726f6c7c32f5cdac8dfc47b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2315354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68655a0723fd346286349320806ab9417546d11e3e655000dcc7b937daff24a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU9288832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5937e23df5bf5fe55dcb3a2654251e317dd4321c42ddb5150a6ca4dce4e882f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBSMU9288833.
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 0x988bbb4e7c9ad1f77873728c4d8982acc9562959f4c1fbe048a1f2e913e2a211. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2094665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef122c6f472a96cf78047aeb306352574a0a0950cd1740c3e99ce81821928b95. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2094668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01436ed4df9c4b01f10147ef5ee4c085821517e29bca769c6255084b3df55819. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2094669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443391c4453dd13648801966ff4c0819757eb6d3075187ba8bc6b6574f295b25. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2094660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4947423609c9649d879ac0c946979bd83d3eabf1ba0a7cdce7ee2a923b64b79d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2094666.