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 0x1d8a64394d838a7effc110d9f163084f5ed81c7af7a743e4feed90f6ca0ba580. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1fea620-d702-4f5c-ad4b-6fa2990198a3.json and https://artists.proofprofile.net/proofs/artist/b1fea620-d702-4f5c-ad4b-6fa2990198a3.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 0x02f168dac4d9f99d0f831f50aa238dfa3cffe36845302640f5ef49fc038db9a4. 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/AUBM02300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd4001bfe074ff0de697ca75ff82215d2502256b834392266add8700553580. 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/AUBM02300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd941ad15efb4dc74f36df81d3dd70b1d29e659be91f54f7fbc1247b3f09bc6d. 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/AUBM02300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25778256f2905eff106028fbab4919c81af2f432b81285c4fb9f41396c144e79. 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/AUBM02300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3054e2f81dec3bc016b8bb4a97c871c6f8d32a8a0123606b3699379d53abf8. 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/AUBM02300035.
Two Minds, Two Days, Two Mornings (feat. Tia Carys)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc7fd595071f158a54aef24c6018b8a374bd65f16213c2f8743661e88004e7. 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/AUBM02300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f795b184c754c38b6a72a246c1bb7de85860c41a37af5b911a084de4850e88. 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/AUBM02300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7434f05444ecf156821a9bd3bfc876710f2ed4c0580b7cb7fced896f4af7d89. 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/AUBM02300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397a63338e265a857102decaa25e213672eac99b99ad618835bf94abf7806919. 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/AUBM02300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc750a7c7bac1f775f93cb0076ada2a492aadf8315d7a9344fba3661ce7fb6369. 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/AUBM02300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11048a0c66afbea948ebc177ce857f31e096756cacee95dda50de24be709d1d7. 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/AUBM02300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204b09daf5d11779142bff4fcea57fb9b8628bc3086d78ae48972934140af8d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUBM02300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2924b68c1d5fa4b4852c8fbe2cd4e294d12443e963d62f7a3867c84cb885a. 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/AUBM02300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f168dac4d9f99d0f831f50aa238dfa3cffe36845302640f5ef49fc038db9a4. 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/AUBM02300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdfe41148f97eef2caf966a48349d8a86f159bcdecf9d7101accfee58cc250. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUCVZ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b65692ebf62424cf28bc2040995f253291868643e8035b7a78bdceee7d2be. 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/AUCVZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218b1cacb7784f012c27d69d0c983649603cea6cc36df4f96bd59d4f3c6fa3cd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/AUCVZ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc661144e1a8d7da5c1790267d4b02372e0ff7e2cd6ed2e9ac65303f5a1213b2c. 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/AUCVZ1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af3629a25350e1a48623e0cf56b51de6a4be38f87e5efa04e12c7c09e7f6e4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAFU2110348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3c817bc97ce6c2b10392e02054d9494c88eca74a789e8ccd191ca780805af4. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/AUUM72400228.