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 0x17502ec4ffe806ba2e53d4c0eebefe002b6727f5806e8319141d48ca5807bacc. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e59a202-eca6-43f7-a72d-782c2608a84e.json and https://artists.proofprofile.net/proofs/artist/3e59a202-eca6-43f7-a72d-782c2608a84e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In the Garden of Polyphony (French Renaissance Music for Lute and Guitar)
La Gracieuse: Pièces de Viole by Marin Marais
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 0xc1f55284156caa9537adad94c44d432b3e93d50f306d601426a092151c267b56. 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/ES29G1301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ebd3bf0134565fe38a8dd1d2cba98f09a8e617fac0f4af1d747bb1dc09eed. 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/ES29G1301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257813f2df8342d70dedc1b92915a552b9b1c724b4412abf965ea935f5a6a1bb. 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/ES29G1301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c343ed2babedeff0bf6db0fb120ef9b3a0d500695eaf5e0e9fe2b2b2305a4. 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/ES29G1301612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f19bbb8d230792fcadfc39255c9afa27f2ff9b3922ac36f7b431b588fd266e. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES29G1301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa596be61b36da23778b74e01be2fe19801bbf7c5acd58013ac3ce666c059984. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ES29G1301621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0cdcfc7ea3451f6e10d2c10805673a49e7564b7ba066e6c7aceaa71ba55a0c. 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/ES29G1301626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21728f9f2c3ced36ec5ac1b5203d9a624bfb3b088a9b2f7071be6a16032278. 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/ES29G1301627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77156a48329ea27360ffc1948f24d4db3220e39fa8876f6e56a8a2126919f9c7. 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/ES29G1301628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141784a01d0d8d0ab018c163d08528a28633a568ce74928fedd30e45f4547cb3. 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/ES29G1301629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2015ab396273ffafa07ea0e22d7865671844e0a5bee0b0f0a7b86f451843e50a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:41:56Z), 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/ES29G1301606.
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 0x748e81ba7ee4d2abbfb9caea5d6b036a82fa5b81963c52591e8f67814ce01b1b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ES29G1301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11cdacb573b85059ac8f408876941d06a28013e3f8f0a6c3a8027ec2097f6b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES29G1301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d0a1d3e9e28612c2a80ac75c69b3028bebe89e19a3ef3e6e5621ee862b1f21. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:35Z), 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/ES29G1301625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05d59ba21703202907793fe1401bf5e02dd51be694c3a9670a653fcdc360092. 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/ES29G1301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873595c1765ea6f64a3c64e20a00a78332ffba707d19e2db65e42456743fe2e3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES29G1301602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691f4819fd1bd0834fc84783c3ff928c59fa77a7fa7e05567bb0b84c82bf649. 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/ES29G1301603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17fab1cc7e226f718c4537e24f3cba9a9cb6dd67ba6c11d27c7244780601cf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES29G1301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ce14c71da8832f6d771df7095025c8a23b640ed5acca25285464df3841d7dd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ES29G1301609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fee5871311afdccfd7e706cf114c2d32f195a3842455e5a41c99b73c6babb1. 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/ES29G1301611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde81dc876c5f811bfbdbb5b7650b41a489b58334f60dd58fb917cbec317df64. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES29G1301613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae4b6e76e522760c590c500e85cf7e3f7b976466d59c84ce84c58f9f05c89de. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES29G1301615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ad45ee98cdac2956046a5339d12ab9a8ef5c562b52264db9b1adab696631b2. 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/ES29G1301616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813224faf872222bdbbad502f086811ef074b63c6005a291ac3bc2adab256527. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ES29G1301617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f88349c1f751419351c376ded5e6b4d4fd22032895d5dc0c106b24dace0a9cb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ES29G1301618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e1b44036d0ea8c15ae680d994e82f70660191da40c917ca76465d35f570b9c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES29G1301619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd701b9571dea34760ecf352d86c8779ecc11242cbf9d5a54f5112e6b9f778. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES29G1301622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f7633e1a3bd7bd7bab68c9689db5e60dbe72cd32ec6013c0c5f12928fb663a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES29G1301623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e22495a50b2972796c3581d55c6e0c464f8fd1a52f6e1fb2e8965a3bb22383. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES29G1301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20626aac674f635d8e95f5939a70fc783341e78a77aa6dcade10b357f9f78196. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES29G1301630.
Noël: Une jeune pucelle (Arr. for Lute Solo by Israel Golani)
Noël: Une jeune pucelle - Arr. for Lute Solo by Israel Golani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6530b9cb2e2e042dcb251b4cfd1d20a588ef57dbe16d23dfcaa187f1f036cbe7. 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/DEUK22200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d048ae9757a5cee211f24d01db8e687e828fd3a183eef66cb37903efa65937. 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/DEUK22100009.