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 0x13ccf9d07c1037f1cdb550d9dcadc0b022a71958e26d375e178c991e73fe0292. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee2c8e13-2d04-4a3f-88e2-0ee318ec5ddc.json and https://artists.proofprofile.net/proofs/artist/ee2c8e13-2d04-4a3f-88e2-0ee318ec5ddc.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 0xf17978404687059cc629753567e7d47b49a4a1e08a73d7dde9c1d2bc6ae79135. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZR8K2321700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2861ab4e8409c7deb9fa5e150eed8089fe4f0cef0eaee730583bcf2e1af1d51e. 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/QZR8K2321701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70e855dbfcaa2a77a66d4ac31d23d0b33bbad1c17327e441c3e87f000f930bc. 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/QZR8K2321702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b94cd66c8f4ba0534f3e21d31f93c1a9c37e86831286824b2b16ccab5355a48. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:36:23Z), 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/QZR8K2321703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2978b472956f04c212a4e34ab10275bfaa85987edf639fe543840eb151e721. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZR8K2321705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43810d115fa8171439a6ed546214a324118be979496fc558ba55cde1f08ef59e. 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/QZR8K2321706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72066d3079209fd4797604ca57f3c355ea63d88a18bc96534570af020a8fedc0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:28:13Z), 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/QZR8K2321708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72b7144b9354980ee79192abf785c7d448f28843b0ae342a47007bd2404a618. 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/QZR8K2321710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1569cd7816123c1a4c8da93ab6a262ec09ba95f935f2d4487b4680f93bd819. 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/QZR8K2321711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92adf73b8cb6681f45fa52ed9ee3f2aa7be8a860683db6d03b231f2b2c8e81fc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZR8K2321704.
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 0xf4f8bdd2d998b06da157e0398e0b66b56ffc0a3f5deef166d8b4de20fd5a4819. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZR8K2321707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde29705d7718e0e13a6c2fe8ae7962e53b259c4de55b2c5521399f61856fdcc2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZR8K2321709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017a8b4f3cc51374913250cb1b9b8d481a242e308607deac643d46f94a9a3435. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZR8K2321712.
JAZZ MONEY THE PURPLE TAPE (SLOWED-DOWN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ced3eb9c5f3ca6b4e5d5f045127fda3c0bf2089f9747848d2b3f3bf851468f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZR8K2527003.
BETTER DAYZ (GILLES PETERSON’S BLUE NOTE DAYZ DUB)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f02636db6fccc8fcc831e827b3534dfc1a81eb5da891a67c511f5f3a1521f7. 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/QM6N22419299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf374e81d09c69f97340c2578b785b4eb29ee69b73062d52e601abbb4bc26f5d0. 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/QZR8K2321807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38edb88f0995d60725e85b1185ee68dd1c4add2ed6a0d76618b31c267419bf23. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZR8K2321810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030400b044a3d28791bfe2c765f84134b6df3c6803393d34d079a2b7380153e7. 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/QZWFQ2419017.