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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 0x99a8c4702ce53e69a8a665d04595647391f53db39ed0539a3383f3a83870b3a1. 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/30e7c5b5-e281-4f4a-a182-2a5efd343d7c.json and https://artists.proofprofile.net/proofs/artist/30e7c5b5-e281-4f4a-a182-2a5efd343d7c.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 0x4d99865aa090b951eceab87021296a3398731e02ee1b1f46d960a326c18fb69c. 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/FR9W12302814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b31d5a0311cd976acb30550b4c463daf3844d02433cfa31a6e12a908ab4d4a. 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/FR9W12300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dc57465611982b1cd88cbe3f7fc7c46c65d661aa05aa0e10740abd767bd00. 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/FR9W12323247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f65c5a287ba99a56fe99738983ed8bcf4e1f3a1da4b57c11c79b26f46bcef04. 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/FR1A92301963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2cc0604b2dcd597ec903ee99c623ac91229d756b7db5610d5118252e53b1db. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR9W12314248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81976a21e467de236e511ab9eacc0ac54003ac52fc3824de861de55868ba737b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR9W12249577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f65c5a287ba99a56fe99738983ed8bcf4e1f3a1da4b57c11c79b26f46bcef04. 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/FR1A92301963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2cc0604b2dcd597ec903ee99c623ac91229d756b7db5610d5118252e53b1db. 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/FR9W12314248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99865aa090b951eceab87021296a3398731e02ee1b1f46d960a326c18fb69c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12302814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b31d5a0311cd976acb30550b4c463daf3844d02433cfa31a6e12a908ab4d4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81976a21e467de236e511ab9eacc0ac54003ac52fc3824de861de55868ba737b. 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/FR9W12249577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71185e3b1d2c6836df44389ba1834449eb4180002b2af9dee6a489a87fd93be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12207735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15568bc32c1ff9019e6d30341fce89ffbe53db146233f4b391d63f40e5f126e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12208250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb35dcf13a9bedfc907a15f7899995e22c9b9956ede00df3fcb67d33980ee9a. 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/FR9W12207737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d55780e78c2f2eec70facc4d7db3653f01ed74d73f32acd7cb2f459bf3bad2. 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/FR9W12201229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2191bbe3cf644603d5557a561c84aa527aaad52697818e6f823655d7478182. 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/FR9W12131900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5dc1a34d683cac74d5069a6332a4bebf2301fb8b38c3a3ddf451f94e4a7e54. 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/FR9W12131901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728e18e07473ff38800bb74ad13023f0e70505cbe2ccad46bd2f1c5034356ec. 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/FR9W12131902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e506fa221041d550e386e60c2ece8ed199ddc908a62797aabbfa80689b6ba1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12131903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8ad1185233a3ca85f3de942cba02e52072bd9bd9abd09c0190a0fbcece591b. 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/FR9W12122765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8ad1185233a3ca85f3de942cba02e52072bd9bd9abd09c0190a0fbcece591b. 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/FR9W12122765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b30aee30c55043e5448eca04962d8ac6f78c101135b98f891561ba7f0e86f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12108181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28d91d4ea3d236f1bc306a1caf9b04b214ee39780a5d13aba97c469768732aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12108182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c21913ddabe499661a24ea09c9db6114ec7f50fa3916a16cd2277651aaccfd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12108183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ee5595b4bff9a3854fda840458b86ce1200dc728accebf96dd979dc7d0941. 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/FR9W12104491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157a58395f33e96f6dccb396506d9c2200604d8171c9842040860990e35f5baf. 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/FR9W12108184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ee5595b4bff9a3854fda840458b86ce1200dc728accebf96dd979dc7d0941. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12104491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9dee2ceee8846ece204bf04f66526b9580d903c8579a759127c1a95d4d1efd. 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/FR9W12039325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9263fda2382ec44c508ab506e8288840ab8f9df2349c05ab64fbcf092c5f201. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR9W12037601.