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 0x43bdd91ea135347d5ace24eb6f95bcbae2901bc4a17e09079e718ebc87cd21ca. 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/14d5afe7-a6e4-4a7e-bd6d-0d422bc5c382.json and https://artists.proofprofile.net/proofs/artist/14d5afe7-a6e4-4a7e-bd6d-0d422bc5c382.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 0xecc0f782884b80bc88850fc7b2c0b92c18f2f9421dd2a7ea28c5c29a31a46c4e. 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/DESJ21700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180ca56f57d41ea3780078cd9fb739722ff0f10c751b0a808521a04460c1bb69. 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/DESJ21700196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b204a21c30661e3dbf624e40c34076331540e71b9f9cda7797a38659e6bc6e2. 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/DESJ21700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0c8436706fa20bee4d7398a45f0720a02a7f10e9493b28341fae9b0746694c. 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/DESJ21700199.
Adi Stahuber und seine Original Isartaler Blasmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65731404e332146c04bd3cf3d5001ebd9a84e95bde1fbff641fc3cd8ddeb4fb8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DESJ29602540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99389528962f55b9903dc0a8962ac14dace38e5283020218a12ba5810ec19da2. 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/DEL212411658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8444dffd72dd34e995afab3c3a67e1cb096ee38d0831f411cf61fc77190ba6. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:09:36Z), 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/DEL212411659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61761c07954f837096d26ceb1f25279d7f34a38df39d5738faaacf91133b95b9. 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/DEL212411661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb5f0716f60454060eeae1bed6cd60f3624856f4424b1754a043c7abda57a2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:34:24Z), 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/DEL212411669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b2e82783edd421ce948f745fc2fa622f446dd456a24853b9e7ba856ad1bf3. 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/DEL212411670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f44b9e8e9cc5cc902ca71751c243b98ad4b9c8c77c27def18af495986e2992. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEL212411671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee7b0d2b7569891bf99814857392ec71f01ea41499c4cdaef4bc3434f787afc. 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/DEL212411672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6113556335b1aa9c02a3b26c61033f732f7d663b7e3ce0b2e4c1af2787f3503a. 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/DEL212102558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe848b7bbb5422752e546f333a146afa9726b97afefc7838545e57dc965d385ac. 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/DEL212102561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed53a454c1de7eef96a1493e5b817ae7f739cd9d92927176c79be05f2892262. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:05:13Z), 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/DEL212102562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bb7c1511f601d273c982740b0756cafb4dabbd9a694f581afdcf6d5b2ff8f4. 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/DEL212102565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b787dfd82597c6562eba30df084e5da217e327252f9d1a592fcb7e003a21676. 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/DEL212102568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b6bc4b87170d75bbdda7dc4228dfa0ba2662fe46d0c90989634beb9c51f36. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:10Z), 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/DEL212102569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6f17fdd96c2aa4e37907625205f44bc738d5e99b7ff1025066e1dcd4fff8ea. 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/DEL212102570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dde5ef7ff18a19fff74ee5141eeb1087883341ea4cb52b0df2651c7a1847de. 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/DEL212102571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94138dc57764167af94b984143a3379269eedd91cfdda19309a680e1aa7ccc6. 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/DEL212102572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ab0137fa5c44a60f79a8c0332dfa2f1746e54c1e3fa797d437875e32a22625. 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/DEL212102573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c93b1ebb4b147fc09f35619524818f7458ea8148aaddf124bc9151d633e7b. 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/DEL211801033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f597e31de490170e6d7c23037930006102ecdb2150e3ecdc3e2cf0759205d. 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/DEL211801038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86011f7a0ae55b43e635d258906273259a15798641917804e76a4df82a882661. 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/DEL211801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45297a53bd734ada01ee322dd71d604b2dba6baff6f921507335a30caa95599. 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/DEL211801042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bfdc6c2c3c74370fd2420d21143dd47ead693e614c18db3253a16b88ac6b2b. 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/DEL211801044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4bc566d9e241a09c980c580c358e4e9af15a30983572d2d508728c89843a51. 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/DEL211801045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dcd54c36238fb24d22cd2c8b095db3792783a500dc6c52ffe1b082b5c73b5. 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/DEL211801047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7df6313422ebef197c7b6761521f9d99fe2ffaf46b53d1fa8a4fc93c5d1647. 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/DEL211801048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d37d41e447d87e1b4f743c09fbcb4d74f77e51b4f49351370ea4a24b57ee907. 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/DESJ21500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42286ae15b28c5b656db5f3c1556daafe999c884b500ec977dbbdfea92636590. 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/DESJ21500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c20d15addb7026e6aaca89cf83312abab20926601217e832427b620edd05b. 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/DESJ21500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488543d1f7380bf60168c93e71a57ea39d1984e60f473854c8bf2f4ee38c94e1. 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/DESJ21500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d7f48c6e3864454678f58f2f5ef0920b0d902192958f95a97fd368cd408d53. 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/DESJ21500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c13702371345d3ccc9d6d7268143533c493a7a977311597fbec9e964b43a9. 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/DESJ21500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b5721c1f672ac4e47652d34fac39191f41801dec43a0067e30c5d66991a7f. 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/DESJ21500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082ecbe4a4288b8a8459497846c89ea630ff6e2dbc959fadd658b287c5f9311. 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/DESJ21500242.