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 0x33a276c36db53600527c78f467be921611e17ab47081fa81084065a05c090eb7. 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/3e6229fe-1b0b-4e72-b44f-3cf4e5f3f084.json and https://artists.proofprofile.net/proofs/artist/3e6229fe-1b0b-4e72-b44f-3cf4e5f3f084.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 0x3f04cea1f643b79008cf26e4d2133172c62086856291553ea63c7704e1e719fa. 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/GBKQU2348973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048024d6c4a1bfc3d84355cd1d28cb2c220d5c7cd94385e439dec339dc30fbf9. 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/GBKQU2417040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0477187392d5528ef15513cb3fc24f8af4a0a72609b312969c05dc9cf73c8b0. 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/GBKQU2417041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c9b9f2122866435bbd3cde36833bebf15fdf464d06c0ad025187336d35d03. 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/GBKQU2417042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdfc57a3adae36ec428583ccc9b5d079d81a456f184172c0f66869f915615cb. 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/GBKQU2417043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048024d6c4a1bfc3d84355cd1d28cb2c220d5c7cd94385e439dec339dc30fbf9. 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/GBKQU2417040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0477187392d5528ef15513cb3fc24f8af4a0a72609b312969c05dc9cf73c8b0. 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/GBKQU2417041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c9b9f2122866435bbd3cde36833bebf15fdf464d06c0ad025187336d35d03. 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/GBKQU2417042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdfc57a3adae36ec428583ccc9b5d079d81a456f184172c0f66869f915615cb. 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/GBKQU2417043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b44005a5823fa5757b4852415be489771c6bc6e1a37ce0dbdf49522596b5c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBKQU2457530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321394f56fad7b830a02e0d42d24da922bd02a57b4390dc5703b967f73af4f84. 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/FR2X42532802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb891537219fcd075abd7700c077c4f52e406a5f3326690d7eab7ad6e531ff9f. 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/GBKQU2354148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e339a797a5f2b377208fc3df90ff97a14d834bedfe0868f2bf1baf67f55853. 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/GBKQU2417052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a6fdde88691233c0deab4388421795b38f22176a7997fc7f0614e48ec1f2f. 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/GBKQU2417057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d01b64c8cd336f95a2ed4af7d7d152855ab2f78839028c2fefe7ae4d0251188. 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/GBLV62302463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c58bf0ad31ec27a83fe403b31bcfa021295e0eed08c0483e053f1d5d9c2a5ff. 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/GBKQU2380727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe852160c37240fe71cca9c7b17e081fd56d5e9bdf59dcdf0fe7cd2c365a0d6d9. 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/TCAIR2456589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf268b1433a4328b51f2be33730d153d0c948ab0a868bb81b4a101935292e9aab. 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/TCAGL2232753.
Nothing But... The Sound of Future House, Vol. 29
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405bdc6480224417d5690a7762c4536bfe45cf2637bef265b85dd98e80f5839e. 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/GBKQU2388417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfbd3b2f9c66b046bc5456e9e920a7b8e7831d3eb8c018ab967aba66ce3af4f. 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/GBKQU2382793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3434b6a1421a652e239cbfc7fa8be4deecc29698112960aad3079ba76a3184f9. 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/GBKQU2382795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4879d581a17e639cc8482af1ab4bb54b0c680c231cf98ff872c917ce8e431f39. 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/GBKQU2382796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997ea9e80a8a0d6929937d2c64b72b428b1c8486cd3a917e3e466d01a1bc09c5. 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/GBKQU2382797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddba0f6a97587d0c60a610e45b667fd193da3268fda79b75f392df436223f05. 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/GBKQU2382798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3b2d3c9a676c02298ae07514e220cd4891f7620553558dc2d38a168dccb0d. 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/GBKQU2382799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f893eb45f50167c91d9a0a1307aadb86423608e06383e9e5d11b5bef30f7c0b. 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/GBKQU2382800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae4fe7b43783d677f5b129b932f3b968ce20a08643314ac0eba34a8c2db0424. 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/QZHNC2247800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcf5306463815d16cbcd69ba52b8c824aa2addddf56af1af5f30ef3c30fb71b. 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/GBKQU2382801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3a79bd9e5cc19b6af0d639caa8588abd4dddd061a6af0051b4e58f0c50b7b5. 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/GBKQU2436633.