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 0x868cee6c819e0b6e2a2496661d82e1850e69b176b054d7c67a99e8812afdcc4a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cecd8eb-132b-4ed0-bf91-e13f0bc8aae2.json and https://artists.proofprofile.net/proofs/artist/5cecd8eb-132b-4ed0-bf91-e13f0bc8aae2.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 0x45bc7c1ed57b31d98480e1c98ec89573472892f5ce392b467f416e6c0820fbfe. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/TCAEE1943310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858bfe23dc3ac8a7692e2504be946f801a6872855922aa338dae202b86f87218. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:56Z), 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/TCAEE1943357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3486bbc4f606fd754167de9fd215db792b9d8358106a20442e983656fe82482d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:45:04Z), 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/TCAEE1943370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac441761d27cee839245179932065fae73c525669d199b064eb7dc341f22ae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEE1943391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e05b331b1d9735b8e704f7d3af208e71032462b47babe92275eeb23c284fe. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAEE1943417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1d3165eb99b2c232c6383f0fa39bdfe2edfea6f64a99193942422338147e7. 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/TCAEE1943426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea937cffc952884c98f672e693c3a15b190b1b29aeb009342570812e9612d0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAEE1943431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf243997e219f990d76f225de4f10809df2d2b0fcfab5dc1c3f940a26df68c8f4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFR2186336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23528905d7bf70a4b47fae8468e130e4c254386a2a2f66da4c751ad4e77387. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:09:20Z), 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/TCAFR2186351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d73736b8b1a37a97dbe86feab911518a87a686d73baae6c896ba2554197a12. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFR2186379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4fd33ef498fd6eedd4227ddd35dbeeef8860a766435a1e9bc892b9081a042. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFR2186481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbedccac37796975134bd6c7e55038575cbb4bf86d4c71a79afdffa27e92e57. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFR2186547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e588f830e03ea62b16ae848b86df445d9dc05b012ab03ce141df22fa4fd49. 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/TCAFR2186559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9e73a9a94dfe0abaefa6dca36a8ac26cc13115ab85e65e5e3cb0934989c567. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFR2186562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a63995d15447bbe13bde1f5f4e46a6ea407d6dfdaf2c39d2ec1e1c6144637c. 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/TCAFR2186571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1c6b09d71e57c92d51a1f71926631bb84a7a23d028edc2b0310d68b03139d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN72255863.
Mass of Peace (Organ/Choir with Trumpet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcee94ee590743edfcafd60ad1e5153446b21aaa0a68b070008ba655f989c4c5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWZ2287088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f79be3fcc7baf029b2123247cdee3940aa7fa1c1983000d06423ffa1478214. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:32:13Z), 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/QZNWZ2287089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36937c8cefbbc2fddef2f1649e1a5bcbcac9941603137a5db21907374fafd38d. 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/QZNWZ2287090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d20aa74a6963d9208d4c4d506665908c1b56a02d69a3fed844b1f0e60f0f31. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZNWZ2287091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56e38af167d20df791e679decd0f8fba62586153debda93390b59272714974. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWZ2287093.
Domingo de Ramos (Salmo 21: Dios Mío, Dios Mío, ¿Por Qué Me Has Abandonado?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221b2e81552c8b17f91a5f67f9beeed011b66610abfefa6bc880c25814eb81ee. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ72461781.
Christians, to the Paschal Victim (Easter Sequence)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81074cdd23e7008ad9c732afac969e6d2bf8ea09f7794e8dfae5d964d5fc7688. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNA2401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf881752ca426fe5cd4978f6d3eb733bcf6ebde26bfca207ffd4e99e564f96946. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/QZHNA2401702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d2aefab30b73c13804dddadd334d14567d0bdaa6e4c5272f55b54b23b115ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2401703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ce2d7d07866182650142f4b1628609a88af98beca9d384cbd4c5cdf49832c5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZHNA2401704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81e5ae725ce8b1cecfdd87de3cfc9692643bbac9ec5be6a8bd14e2a7c56b014. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNA2401705.
Lo! The Angels' Food Is Given (Corpus Christi Sequence)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2a88c33061fcdc59bea96e3a22d191c695d022ff76c146cbe035183af8f8ed. 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/QZNWZ2439258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc4276ba78ee0a0ea287316970c092c8929970b6521ade2c9702f3ce4790bce. 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/QZNWZ2439260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5dc876e915186c5c66740d986d8ac046616ec9fb5a66cdf0ca4098e885c0a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNWZ2439262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc52596e34a029446bb5f6b9127f84ec2df553c9672843dd703247018905cd98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWZ2439265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dadf4698bf9a032bcec76e915f94b7c8646e045cc035f1eb529d4aa6a697823. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:56Z), 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/QZNWZ2439261.
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 0x1eecb52199eff01708c263d7d43ec4754c0791ea59f64274506d565b94a920d7. 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/QZNWZ2439257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573bd7bc9d81dba845396e10d23901e96ac72f3184e5d00923137107fe3346ac. 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/QZNWZ2439259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582cc382831f6af1a6f2c83a7fd73ca9c02bda1d1061ac0a01102a5d90f8945. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZNWZ2439266.