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 0xcb6e45cc3d6df0e3a0f0564b8ac6e517c2b8154e7d0c0f382bc2f2569d3ca726. 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/7b01ab38-ba22-4e47-a329-661675129062.json and https://artists.proofprofile.net/proofs/artist/7b01ab38-ba22-4e47-a329-661675129062.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nisser & Engler (Santas & Angles) Part 1 of 4
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 0x30210395c9211d352f869439ca156a32b6a722cb39ab8f356ae4a92b244c8ca8. 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/NOFCT7712091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd969ba9b356fbea8326ab1f50fd0c470ffe2a129a74ea08f8ff6945bbf566a6d. 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/NOFCC0802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8dd158ea229aaefb8719fb837225313bb36767669c134bd472f51f3364039e. 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/NOFCT7909070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c262f8f0247f5e83a6eed504b5894f89ec6f5d6977fda67a421e98d5bf6c3b5. 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/NOFCT7504030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8b8266b72e2a60be3eb6b4182d4cfd64a7b327e3f5584f7f10a6475c7c6ba. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NOFCT7814080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da604ef90417f33710dcdf63c3991d1d8d8490581796d01076a34303ed8e9bf. 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/NOFCB8302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c27b044b17fce3fdb01f2f90b20320796bff8d804ec742b7b2b1c3f5381343d. 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/NOFCL8401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83f5d915987c69de2b97e81ce232a22438fb7db76b90fc66886624f1033473. 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/NOFCT7812071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c9fe33d3bb5bb3ae71d9e49150e353c2c5c0afdd32dc74a783dcd0761253b4. 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/NOFCE8501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf06c6ff8927a0bc271b2ddd12e463744713ff4dfa9a85a860048bb3ec3e73ff. 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/NOFCE8501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd932da2ee47869f11f1870867bd3d0d297e7d9d0dd33427704b5502b781fc346. 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/NOFCE2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4988cd1c2e501d7f7412fe71a28075bdb66250d0a690e2f599651c2eabbd19. 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/NOFCE8501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d296074537d0c6651d6ad8c3fc064dd10551bdb39eb35d66b2f6905fc2221de. 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/NOFCE8501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d1e4456e5ee8082090c18304a877f7cc11e19111fe634d501ea0aa704e4df. 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/NOFCT7606040.
Nattvakt i Banken (The Streets of Laredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241c5e61d7ade1643d0dbabc1ffc5e1381bb0c61d6ba02685827210bc90356a. 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/NOFCT7814040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b43f1c0149f2a4ddd7d70942a4b5ce4f8277e30a82b38bf8ef494d45cc76dc. 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/NOFCT7504050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e542244b752beab6e90ce63d71c981648067ee85e8cd7b96249907a6b6f8e02. 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/NOFCT7814020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d520310839d32cc081b37d6ca8f934663da9508c2b7bb201cff27c75cb1702. 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/NOFCT7712070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31bc801ea0e5bffa2df46303ad7021ecc529a64f19899b77de024e176d175cb. 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/NOFCT7606020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5272b3ce4f3c5781efdc5d533392bc34f5af19130ca70d186db9b4c79376dee4. 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/NOFCT7606090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a54df91af84f0c27851421168cea6e24e76862838eede6dd172d9594127242. 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/NOFCT7606110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84ded5a804967ae055a326a793bf18d10ee914356aa65696ca47a23d6fd00e6. 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/NOFCT7606130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d30d96b00bd2f9f9745a355157b1a08eb0f2d01aa41069ebb4d8e67ad39247. 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/NO05Y1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ccb5f8c2583116d92d848fe91993af66dac59b656f742cc305f2502283b484. 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/NO05Y1901007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab00186515ec00607abc03f22705f72445487c67ddced775fa3df9f6c5e1da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:29:49Z), 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/NOX9X3379111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a6233cb67177be6a555522bc238aaffe58ae8720080b4f48102cfa906e2c4. 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/NOFCT7814010.