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 0xdf0cd3c259f8ccc893319b48775b4a371f2eda994d40be1fdaaf514e3a99c553. 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/aaf7bf1d-215a-4941-b558-39e7abe86439.json and https://artists.proofprofile.net/proofs/artist/aaf7bf1d-215a-4941-b558-39e7abe86439.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 0x1d8c3e1c6d0b97c4bfc150b1557db0d285956f7c757f12f50c465a94dbc616e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYX2247018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce75ff3dc0dc7df325e96a92adb493d6e96f1f04fb023dd7fd80441656a7b3. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZTB32203240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777513bd872ca9e088e30fd189b2b76240bd26a2e45d3a8e2fee9ce96d344c68. 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/QZDA82349099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e1bcb0c4e9df4fa870f542d2d868bf0c623f02760c8051647d97200d6d5fd. 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/QZHN72358786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7700ffc748170f0701848a6ab8ef500edc609f46674aa6fe0bc5fc2cf7384. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN72358787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9012f1b5decafa5226104b5f07891af871d0018bb7a84b9420a3136782abb0. 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/QZHN72358791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654a2656ece75c40c2cfc5c758b1344b6af913cf38b1e7d8c7198ecc875c8591. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN72358798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0b70b2647a47ec60e69357b8f3c60e6648f7dde629bdaf00146f33c37c437. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHN52334049.
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 0x78554033af03b7561d9d3e41862830b892fba431e9cc032f3f4ba73cc4b2f6c3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN72358788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a5ea29c6a81244226e04d7524b65a4b42ff2fab68447ab3c7193052d48aec8. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZHN72358789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d83905d6e045e59881252a78020e1ff84f13da42947e868f9176c5a40a60856. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN72358790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad7fbfff39b4d8853ff2bac359b4d38e2c811817bd248183d8da8566f033f8e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHN72358792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47f3b7930368952db74dcbbe6004bdbe6b08f44c54eb43ddc66aade779bd17c. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZHN72358793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f467a37696d785ea7755908f335c8f2a994e55cbbd3f9c3ee2aa552ff8da80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN72358794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16683ca570c6ad29f97b984c5178077b3ee72d4693228a1b1356c87b3ede1e01. 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/QZHN72358795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b8dd622dac2ce182e8808371ea8b5e2934211537e049a3d971cc0f877fcb0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZHN72358796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3fc2df455a959d6491c2b23f6c44acb94d3d9ca5370c19238f6065ed92cd7e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHN72358797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd3a07918c235672ba28fb334b82b5e1b2f224e9f46187eabb47a3f296343b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN32513798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5caa0f1d0752d572e0a8c7d9df74cb09fc5dc2e2a29d452663c88bb6457edf6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62572869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3960fb6b3ac3913f6c6544abbeae1c03de3063a1dbd7e2065db3d82fdaa3b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN62575438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2151d4c0a980cee2c365c124ba20d3dacaacb9e30786956fee879e234961b77f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMEQ2525664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeecbfc154e903bd64f1bb9422212e359bf7169a85bbfcb0aab06354d0c143a8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7W2513252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eedefc02995b60cf655bc83fe186e224d6aa18ce3f185e707667079c13818e. 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/QZHN52302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa18ddaa658c23857ef7470c8883f3f886d50e585bcc193240b9e72085e55f38. 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/QZES52213609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6b2d313a821c061ce7527b818d468c0c386e9bed9ad6849038e8dc7cd7c67. 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/QZMEQ2266628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1dc6fcf1838deb06645f5371327db7b6e752e2bc9de17bd5d466c877d0e82. 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/QZDA82242693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee268152f2f6fffe54132d645fb35441d3225ae14b6293cf686998fd1146f910. 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/QZFYY2278770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b07588494cb7022f89da232df5960dce8db8980e917c8b80dfecaad82f5eec. 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/QZTAU2241427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfacda4b8799055af2a98cfc32bb2aed2337674f66a0b49981b4569b6cfb1c3. 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/QZMEQ2393560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29edfb57acb7810e1ffca194e53e3f3dd56e4412f806427bb18ef81881dc4d38. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:54Z), 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/QZS662236648.