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 0x4f68916fd91bdc03fb8af89992b184a3f26d4c87e70e29928c3c81e9b05cc6a1. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00388c40-af5f-47be-8c6e-82504e48588b.json and https://artists.proofprofile.net/proofs/artist/00388c40-af5f-47be-8c6e-82504e48588b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xab84d8845ba02dab682af2a1c0f6c7294ac06a3da4a333785caabbcf9c5fc9f0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AUV401452045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9e2999ac430745d369b902c7cd4d2a82d7cbc7cbafa932372bf273b193caa. 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/AUV401452046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8376659cfc083e9bf15ab6744abc41c96f4b2ba9cebf2c44724ce8ee668f4c33. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/AUV401452049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce8d954c7aea263320b489e47d4dd53253ea0d15b9d5517bcf052aa6dac2c3. 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/AUV401452050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe787fa8903d20923081e661836e2afc064d5cb07b61a9ff3e8e9fdf7189eaab4. 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/AUV401452051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd588b1706f8e0db30b1e8cb72d661ddc6e4ab1838be7ef0d9287416df0da2365. 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/AUV401452053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11436e19610a709d3630c5825281600b33b431d642f9aed47b374453784a80b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUV401452054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe202f911bab6a4c0e19cfe561d0fb018b1016198897dff6119302949c68d6e59. 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/AUV401452056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8475a7416f23d146ef78c95c0d4b7e549ec2c3b38273a43e80d0977125e758. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUV401452057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe967221f2e807f644ef091712f93a44789e1bd9c19b7e4e7c0268165546b77. 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/AUV401452058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8749f414083601f7e3fd8f2cd730b24526ddf5930b05805c01e73c120d89ae. 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/AUV401452059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3789382b0432e0b5b4822df1dd6ae51ddb83291e8dbe89ab6c35a854ca9701. 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/AUV401452062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02570f1d43b902106478156477e46ffe5b3b52267d3889ec468928008f99d6ed. 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/AUV401452066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285414b80a871075e3161dc7deb6d78d9110487af5f11b73acf280b31be047f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/AUV401452047.
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 0x0b20725e432aa491b16144ee9ab22bca12cca5981bf6ef563759aab53379362c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/AUV401452048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab79f1b4c73bcb8790fa454792036087011db1b506d0fea40aeee5affc5c29d6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/AUV401452052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afdf3e6f35fddc224763ddf8cd7a2bd6ad930bbee19b75fa46b18435b88fc7c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/AUV401452055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba75542dd9deb0893944972db363c6841f00f08c90323b3bb7bd728b218619. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/AUV401452060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a831f75500e7eb21e8b740779c2532c77b21f7f5a3d28c36b7519122efe8ca3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/AUV401452061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34138ad08168ed9309dbbc10b08d128d9342cceb52af5247463565fdf54f97ad. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUV401452063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd93761102722ebcb7579b377a43c4b8aecb6b4bdc75b83d30db00f0f50a6b5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUV401452064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4ee284505eb8eded91079d77aa572a9f1dec6c491a5d9047cea2d8f174884. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUV401452065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093cfab8332ca922244f11d46441ab07a2bbcd76525f3ad4d04451e505e425f7. 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/AUV401452429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f2f81a160e81df0c3ec6981c4ab1ee6a65e605c9a8db3762836e52c4611cd5. 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/AUV401452434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576a2061d7b2a29f47947357701e4a4664ade803c7b356faf0c6d21fc4c3badf. 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/AUV401452439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f0990ba1cc87ce17cd45ad0327e4de88f65ec418b66c88351899e0e0226cce. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/AUV401452435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbcce6f27b56f9341e07329f22d3e2843af60656c09b6e2e8937e67e0cd8170. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUV401452440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14f8b6ccddd8458bc99f071d04ef12c66da3a6613bebf4917c4a1bf93f291e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AUV401452442.