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 0x5b644a9f8edde99543ffe1f595160f00e314a4a79af5b2445cd28ae6110630d5. 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/f9c26a1c-2ae8-4559-a9da-003d06aa0efb.json and https://artists.proofprofile.net/proofs/artist/f9c26a1c-2ae8-4559-a9da-003d06aa0efb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let the Rhythm Lead (Summer 2016 Edition)
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 0xc47d31bd7619660ed7392d5212335bd58efddad59e419e7a3326ec3261a255e0. 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/ES71G2247671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2165889848813d4a69e6d5be89c558df091ec2c58f521bd2044dc1af48647a3e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJY2207284.
Let the Rhythm Lead: Haiti Song Summit, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95047fb25d43a74fcdcec35333b0a8825b43d3eb121577a4063cfe10a384315d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USWB11902672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dc7d815493a3cce974c961f74214e6337d1f3a58e112c55a7d575104c5f144. 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/USWB11902676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7ca1b07be2ed6817f0daba49cf20123e775af0cc8b705dfe6bb43119e19faa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES7730205448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9ab31b5924d74fc9f3afba1733bc38b38ad8acf7de88c38732681a69957869. 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/ES71G2217464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5037f9d408c7449d551f5fe9be2fa31d5b8aca4b98c8de685b16f0c35d529b32. 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/USA2P2113335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5037f9d408c7449d551f5fe9be2fa31d5b8aca4b98c8de685b16f0c35d529b32. 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/USA2P2113335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9ab31b5924d74fc9f3afba1733bc38b38ad8acf7de88c38732681a69957869. 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/ES71G2217464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6560d2d026a3e3662f3e7ef173f552b28a989292ec97938808c79adbf25e13ab. 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/ES7739904150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ca32063f8a4c93dae263920e9c27bb0be067e1bcab8c14afb9b541e6de8fe6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ES7739904149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd59cca1e4732c81270854652de1b8be9b612b17de44e92f0ce904f2378518. 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/ES7739904152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d216bfddef4e82a83ca94526d05635d1a7637cf91c48c2052d7b54f8db15f9e. 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/ES7739904153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c33324477f6fdfe8e4b086a94032788367d92c17bc36054fdefb3e9fd9019. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES7739904154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4746895f293ab9d632d854634dc69e47c66eae832801d69f04da67642ffad57. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES7739904155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d24e4f1bdca66fca69af0abbbad2bbb4c72b86c290b9e39966b4867f3f936ea. 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/ES7739904151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c40f96b6f79aaab8bddb92ea6c8315ece300ca1723670c0f3b4a46a033173. 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/ES7739904156.