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 0x4bc3491bdc053ef95883dfd4ba4776cc8bddec32768db6a377a54a8d9f54e527. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34ae03e9-cc1c-4f7c-9d92-9271ef571f18.json and https://artists.proofprofile.net/proofs/artist/34ae03e9-cc1c-4f7c-9d92-9271ef571f18.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 0xcaa3df21aa6683b66e3acd3eb456ba85ed7c18345b324f41c0ca1e2c4b7f0404. 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/SEWZA0600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1938464dcf6cc162c151ca0f47dcd1e27a471d81a5d808dfb686e1e436a4435. 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/SEWZA0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ac092a8485d51531c109ebc592992a2ee6ea418c233a86818e44b12d5981c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEWZA0600101.
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 0xeba92b30e256307fd4e4fb573216aef81abde6d931bdbc81065e9ec37a843d16. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEWZA0600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4bac4a7b013da76d9c8ece70bc6df88fbb7c33dd921e3e80be7aad0aaea42a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SEWZA0600107.
Glysisvallur: Musick from the frozen Atlantis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b5da3822b1a36b5d05387be82ae9a290a9f94578b4bf9921aa54f980a1141. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6722301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2ffbd4a2f93cc7db5d0d8ed15824a025fcc8245bd1033649112ea29a168632. 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/SE6722301403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ec613d079325839a580623e9f0447785cb9ba8a3b4f6be88e97c2fb8508e0. 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/SE6722301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614c04ae1457d7618ff2c318c465e13dc37272b364b8f8e98e9016bc885d18e. 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/SE6722301406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032932261daca26d4c495b9bb09f500b14ad4d6a2eff7752f6a343f2ca19822f. 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/SE6722301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac7d2ae5308168cd6887f3bd8479f20b105bc331c7e1542c46620e88d3a4a9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/SE6722301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6666f6a1e7338a3ff8797a0a68918d2c417bc56a3ae7d73320f207421f17bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6722301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7750fa9b8351897b33035c9f7760d3d6c4283b3df8405c7a58df542eaac9a8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE6722301408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a937f04c455195fd9d18d7c94c15d8012e2cab0cab5e7bf67ef83f6f78d19. 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/SE6722301409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332fa51e643378ac2dbed7e4f2b2dd7551cb310f9f51ed28e24691b7b8773eec. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEAGA1701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2b9b51bc5a8c0aedd5fc700a7e96f92a95665f40643ca056ee804d35ffc8b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE4BG1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77014b84e0dec8cc4923eb2431a877bb1572a65aa7e89d312e1afebd84d5735e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE4BG1400111.
Maria - Medieval Songs and Swedish Traditional Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62353be203686c3a6dcc6c8ae7b2e52b9e3da552fd4957ce8a476569d4537ac2. 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/QM6MZ2231609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643cb33080201bf23cc5cc8983f1dc6572669a82cb53708f6faad44fd9fe326c. 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/QM6MZ2231610.
Cantigas de Santa Maria: Rosa das rosas, CSM 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c5c581299ab0c6d88eb7f0218167d6b60784a07f8dcded41bff64ffe5bf0a. 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/QM6MZ2231611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944603a765642bf963ff1d57ebcc16ceee6b74587de248e91efb6fb1ac8be021. 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/QM6MZ2231612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc2ed66a904ab719f04b3478bedf41235391e0fed0689e0e25d69e507d9186. 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/QM6MZ2231614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f075e54c192b060ed42be96a6c502c07c23016924eab8b59f5d943c6320f874. 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/QM6MZ2231615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154f9836051489fcf2d149eac0464ee009f1867634eaa9a9f661c3c19db8d74. 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/QM6MZ2231616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c9001d8e148cbda8dfff48f2efb25778d2cd51127ed99e4ff55d6304965648. 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/QM6MZ2231618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca214827129c19f4be44fb3f3507b54ace6d8ccfcddbcaf8078de992d57c63a. 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/QM6MZ2231619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0ed16291ace0e816720819a74b490162f48e9bef42bc37a34ba55aefb02c1e. 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/QM6MZ2231620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213179b28a7948932e11f859fcb91e05e11f55085e53aea00df818c25e22cfab. 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/QM6MZ2231621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ac873b62c6b2f27c68d00396b2de87ab565945c1c634569909221a9066cd7. 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/QM6MZ2231622.
Cantigas de Santa Maria: Como poden per sas culpas, CSM 166
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8849a112945bde1848da4604a72f246ce5d3d891eb81631da79497ea19950fe0. 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/QM6MZ2231623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81e2a3805f6fce6c3cc10b8141ca01bec014fbf43432b8f60dfe249e08be1f7. 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/QM6MZ2231624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6d79146bdf043c39b1c656f65b076dd41cc03d1ec1b7a8db2612c60da5b5d. 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/QM6MZ2231627.
Fisher: Passion of St. Thomas More (The)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa042308e7f057ba19eca680ece299f236dcb403d44ee130f34170ad8f81f619f. 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/USB8U1028742.