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 0xf2a134271b113b6830ee4251dc13a8ee67d3a3c85e6b1af24cb2ce00ef04ef57. 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/f696d86d-9d25-4323-a793-5b629991408f.json and https://artists.proofprofile.net/proofs/artist/f696d86d-9d25-4323-a793-5b629991408f.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 0x1c25f6b6d377c6ef0ff00e3641b62887324811736918799a5a01ec05faa6f34b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZCE61857764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b043611c1d13c09abf5dd9785469ead90326a627405de72761e9306ef69ae9a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZCE61857766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3b19d5a2f0f4e078971574214910e421357f11f675cf2995cda8c355705654. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZCE61857767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacde56db7a87bf86b7a790a6963fdfb285e48562e1c584ef40b4effd2fea4fd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:39Z), 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/QZCE61857770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6146e2e51656e9767b135e73ed08fc3695ef973e4076d3667cceeac2012a736. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZCE61832772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e2b08cdef695317fef764cd3843a190a3d3cdcaf07f45133326aba16811e8c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:33Z), 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/QZCE61832776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a9fea81d90db2d72e66d08b98cea60c37983abe3eb229d2ad1e87c8452e0f5. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZCE61851988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87198ee7fba4fb09f4f4eadb7394309899f6037cac9060941d6c12eed9a6398c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZCE61851991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65926b6f5cf80ed443f1d2d7549c088d597ba313f27058c63bdee4438dabf913. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZCE61851995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe69d4a48f65d9d03f169e32a1abbac921e366f0643a8ca40af1080b19c425c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZCE61851996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0708c8318bc55253d02f8add310dcda6a93dd10798ba7b7d6bb2bf87fbd641. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZCE61851998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bde26c4b8d83e7560289b5e71a872c6611afb7ab3630a05cd6dad9e14df5bae. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZCE61851999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65233d8237c664b88545315eb87d078014bd129164092294f582f76ff4f3a894. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZCE61852001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237d26f902498579f832646bbef0e80aaed0f22919da056d1121df27e261d92. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN71909229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491065074ed5e0030ce0c2d58b9cf0d499efffdd9acd530e300c8cab047ac87. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA82018197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e3caa47ee8e2bb630833bb4bf86b338c89ab5995377d78260f32a6af503928. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMER2030130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b2cb228cbe097a22c55ee0b101c02e19372dce2de2a30d698b89106f7a1d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52162974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5415d48c96be853d664f74ec2f36f8a89c3dfb164b47351ea95230d26265708. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN52106854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6577f2997bbd2b400955687bb4fe177adbcfe8725681c8a512a8ac5d89c08. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:04Z), 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/QZTAU2246004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098eba53861dbc95aff6961ce890b67ea197c01d75d2fa54ecb62f7e625583a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92205630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc858c730241004871d6ca01a305923694b30fa085a776363f824463451f111. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:35:31Z), 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/QZFZ72385029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491065074ed5e0030ce0c2d58b9cf0d499efffdd9acd530e300c8cab047ac87. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82018197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6577f2997bbd2b400955687bb4fe177adbcfe8725681c8a512a8ac5d89c08. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAU2246004.