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 0x12292a3af774407e4a0dc48063b056bf8c63302089037f37096969cea1fe9791. 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/fb3267c1-b567-4f47-a948-449eb1768294.json and https://artists.proofprofile.net/proofs/artist/fb3267c1-b567-4f47-a948-449eb1768294.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 0x168677b73bd5a801e81e177f883f1dd0a806ab5dcb3001ac95cba53b2e15544d. 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/NLRZ81900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037944a722fc0f501690e6752738add126e7080b97ef551aaf367d47ef37c93. 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/NLRZ82200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9f3c9fa2a2cd620ed047fcdc6eaaad4195b491e4068a1ca7156095b99df594. 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/ZZOPM2225310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f71ac3ba03b579bd15a8bc566dafaf6dbf899c6408450bbae10b2447e1d87. 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/NLRZ80100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6851ca185f65e8359bb995e74315b3e2352ea9abf77fca2d48cf2b674c8f99d. 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/US39N2202121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772212140beee06413a46428ea963d64a42c40118358f9a72457aedf4c750db3. 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/US39N2202122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e31d8b4c4a727c54d2c5135a20b3eae3d58c3ac333d3276e3345a455231d32f. 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/US39N2202123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b57f03468b33d84d5e524d641acae5a76fb221034721a49b89fe6cbe095df9. 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/US39N2202124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7032215efacdb397fdf86ab931a916c2e0726b1b260205e1f4dac88d82950b10. 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/NLRZ82000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a44bd319e6498ed6eda148ae672b044657a8c3b1c5185dc6e7c8b7208ca0de. 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/US39N2202125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e116f9ab3a3ea60e2fc5f50a58b0bed29e8bb6010489b8fe21a28d1d0c5fe89. 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/ZZOPM2105857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49078c95eff56e6603f50d085a9c38ba29c1b13cae9f11cc8e03adf2dd43561. 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/ZZOPM2236285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06330597eb714e0900dbc645cd0eaa6bd6da36c9a360b656d6588322d1716195. 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/US39N2202126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59e4f850c0c9bcdab055bcd436f3481bba984e935433f28fca63d27219bcaf. 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/US39N2202127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb102e5f7f05a54b554975bfc832fc0de8fa4dc8e40039dbc8df6f66a1f53af64. 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/ZZOPM2117833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0e2b51a7e7b3c44e6bc5287748a6aa94f55a63477db289582b21516ae6e583. 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/NLPL21800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045e75f1b35674b29bb8961f225c215e621c8d5e0627a75e0ac06b347bf84e6. 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/NLPL21800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8dcd58b7be179ec315f1ded948c5becc08b8fa0cfd614e60a9d6790cc288f1. 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/NLPL21800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2037bb82db149c15932e2a6262832c75d9c2e24d6c169e34266e7531ebdee04. 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/NLPL21800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403537dcae4fc3ad68dc2c625a58065335c7743664f122cf4a2e64f61c9c4272. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLPL21800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273dac8e3001bf8b3d4cb60a99aea544f7b5b807c9c6b5ccd3c7e6b9b424f18e. 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/NLPL21800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08acdac3d16b96b6e2e19e7635d14fdef0531cd52ac228e8244c67452e11b6. 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/NLPL21800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360da2aac537f4f8b537b23eb1881eeb763bb49bb02c1ec42713952f79e2c6fb. 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/NLPL21800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d130103c79f3f14319bdce6aa4cf0055c5ad660c806bf4262d86af9e1eb811. 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/NLPL21800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9714b8d4136ff07d86e0396598970cb0fa18e79009ca2e74b7e2aee668349d76. 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/NL2H32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc02dd1c522652b9b8a6526697e1c406bdebb1d435ccb158e37689722ac65b40. 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/NLRZ82400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc878809cff5d53e97084908854c9bb894ef0175fea52a8f61ff8f5d24d450430. 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/NLRZ82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037944a722fc0f501690e6752738add126e7080b97ef551aaf367d47ef37c93. 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/NLRZ82200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49078c95eff56e6603f50d085a9c38ba29c1b13cae9f11cc8e03adf2dd43561. 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/ZZOPM2236285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9f3c9fa2a2cd620ed047fcdc6eaaad4195b491e4068a1ca7156095b99df594. 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/ZZOPM2225310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb102e5f7f05a54b554975bfc832fc0de8fa4dc8e40039dbc8df6f66a1f53af64. 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/ZZOPM2117833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f71ac3ba03b579bd15a8bc566dafaf6dbf899c6408450bbae10b2447e1d87. 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/NLRZ80100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e116f9ab3a3ea60e2fc5f50a58b0bed29e8bb6010489b8fe21a28d1d0c5fe89. 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/ZZOPM2105857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7032215efacdb397fdf86ab931a916c2e0726b1b260205e1f4dac88d82950b10. 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/NLRZ82000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168677b73bd5a801e81e177f883f1dd0a806ab5dcb3001ac95cba53b2e15544d. 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/NLRZ81900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f531d6ffdf11102e8df30361e337ac5909f05342d2ac33cc4b6d4647cb62fb4. 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/ZZOPM2221708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051688d75ee56e82c0518602deba3779e7d6832960ff42057436ffb0755980e. 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/NLN060500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60024b3fe12d813b3c91858276ef8883f3ebff1c99c49512c33656819635935. 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/ZZOPM2221709.