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 0x3386a5c0f8f854a07044ea813847d27a1add3390a00cdeab15edb91eea229052. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e7830d7-e62c-4a16-a15f-5bdd92410af8.json and https://artists.proofprofile.net/proofs/artist/6e7830d7-e62c-4a16-a15f-5bdd92410af8.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 0x39252683e9510fcb6bce6aec6e2eea5e25064ef2c634707d7ff4881551694cd9. 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/PLF242209912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa1701f21c34d90c526011127f03b02e6336809fc23b00c5f9ebc4f0be5a827. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLF242209861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49542576c8cb5174ddae650e70dcd353c94e6489aca221c49357626a4b26503. 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/PLF242209813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2813d605cb0f422711e82532dc98685805441e2263455f32bff4790e5d00f0. 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/PLF242108470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e21f54a861a4a5b01dfe722bfea5330622b6810e5b0d67f349c38fd54c03e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLF242007334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86033695365565e1b2d10c054a59c622f7c11d7ad37e40e8f5f11424ca26063f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLR862000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a6b8af689badc84c6e6f6b631677b40cfe859e632d58e1c653a36d98569a45. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/PLF242107508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa3489487253d9b4a85a3aff0b34c8787da9e24cce2e318ea176ed15ec8d6c8. 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/PLF242007390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6a0838d8cc1e18a61c55a03095155452e45a277834cff84c745ca3efde28c6. 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/PLV402000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6940759959be7449abd52f6a9870f50b95606f3b35acf56af75cbbb5b22e2d7e. 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/PLV402000825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bef0f2aa03913300bc026706b933ac99bd3402b0397a8b0454e076054564f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLV402000826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ebd50beef6d4bb5e83135529c66834caf11d3a46c8e2037f7f4dbcf139ca46. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLV402000827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24e09371c5e83361c39fc32d5e34a898204c528e8bd1f033b613b449a910931. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLV402000828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e68aef2cc4f78755fb68c070e6bf796d1cbf1fa43f158407723da5c1e9afa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLV402000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49542576c8cb5174ddae650e70dcd353c94e6489aca221c49357626a4b26503. 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/PLF242209813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa1701f21c34d90c526011127f03b02e6336809fc23b00c5f9ebc4f0be5a827. 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/PLF242209861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a455528ada650cdf9da865670d66a267e1b0204943369da7687fe32621fd92. 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/PLF242210014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe096eaab0b77b286a30667b673ec355f041a8428f02c66e9cb64999ca4531b. 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/PLF242210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3779953336b1f8336b6ab43fc453cb3fc378989ffcef8436168832c5efaf9. 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/PLF242210019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe679d2b0c35df0e1c61191a1591caca53ed1922f3c725dec16ebacd1c8fea622. 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/PLF242210020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39252683e9510fcb6bce6aec6e2eea5e25064ef2c634707d7ff4881551694cd9. 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/PLF242209912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e21f54a861a4a5b01dfe722bfea5330622b6810e5b0d67f349c38fd54c03e. 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/PLF242007334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c2e84490e20e9dd6f0eba152e6874a60d49d4fb6c4575854d2ee12f8871ecc. 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/PLF242107509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c19cd30489c55cd065af80e74a65c49956eeb01d4ad7145e7325537cd1a1c6. 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/PLF242107510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a6b8af689badc84c6e6f6b631677b40cfe859e632d58e1c653a36d98569a45. 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/PLF242107508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa707884782b34dff70c2ec8f7dae8bc3eb12776dd3e71f9cf023b3e15cac63. 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/PLF242107511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255a69dd68329211fde4e487ec0761b28a9467a19d4cde4770a83ab292d1a59a. 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/PLF242107513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab1f11f3c741d12feb1a88dd23138cc593d6ff7af81913b2770272c3e51ffe. 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/PLF242107516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ad68a6857b8aed4f069891b9c08ca1be8a26d1e92518eb3a1c43c2ed25906a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLV402000753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f61d0e1bc9e805d901ce038c31427c2ca50c127179f78d596c6c607ba85ec1. 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/PLV402000813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4094f7b35694037a3e0da6eb579cf10c14dcabd0cd8abcc7f7c51e96940c0e0. 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/PLV402000773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b78bd62a3d31021b17dcc2be13f3c15d449bc32178ed0cbc7506e86c8f2e8. 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/PLV402000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7a0065ef460c6cf2579583b11bb65b697a93d0a7faece6e1e3065a7c38dc93. 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/PLV402000815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a26889b66345f75f2567859fbf6c3a56cd5e1f01624e70223c8ff47ca1707f. 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/PLV402000816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b76af41c21526b687b9978b8cd091f6c80cb8dd1c85da8186f54125791bd259. 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/PLV402000817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e3fb47cbd7c49a418e4a87452fdb8c8774b432443de618dab975247e96a1a. 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/PLV402000818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bff4a1c5488a08581cf5f310f23ae0e937c881239cb610f833952c79d87e53. 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/PLV402000819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf53f2be065ccc209bb11ab72ca079a66d2770bfa45e8408ab0de5b7cf8853b. 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/PLV402000820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3edc915334fbbb796c315adbfd00456932ec697fdcaa8777416835e460d77. 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/PLV402000821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b511dd86f353fa59891e1042c96010adb592d6bd3fc21aa523912d66dc5260. 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/PLV402000822.