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 0x066e6b81afdcb636dff62d9f0131972581e22a1603f7b9a22c57784e25321fca. 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/fd4a7727-c7f4-4593-8c9c-1e2bcf0be9b1.json and https://artists.proofprofile.net/proofs/artist/fd4a7727-c7f4-4593-8c9c-1e2bcf0be9b1.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 0x08d8f5996a102cd333b6ea84313c931e18dedca7ec6aeaffed744cbe6805e46a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN32155853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6529d8ad1598c0e8d012db5a665beb6f1a91a04f41d6264fe8f69b696f9e796c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32155846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fa10ef822d3db7a2ada7056ad4e6a794e8f554cb7d8e32a47af817b8470c7a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32155845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516bfb80a398b7345c1f213975d5b4db4bf2be2e581a41c0d7afd7990a9bb256. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN32155856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f548d91ced4667eef257c9a080330f4c2a0eda231f58982bb272b2cbd9b4a8. 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/QZHN32155842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b9e623c96813068e30f5629ea0022e24fd93256af264e8d735b4d42b59777. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32155850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b8d890aa19ab5fdd20dc8f580ecba4657a691a4f2a6dcbf0c1a185dfc7984. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN32155857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0973707413416dd6c7627f792b31987ad03f388c0b9aab85f45fb7ae80bdf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32155847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a0fac0ed69d71099924ed29a7beb794b1605d6ff1ca9c474144cdbb4bfe84. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32155843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff8bf1c4cf490c433ffdd66e98d966d2f48ba2e825ba0da9796ec38878349d7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN32155839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e315267bb5e4ad0c57d19a129c498a26549ef9182b861eb1b3aa34291958a4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZHN32155851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3636b6c90177268f8e98baf097365a18f2944d8ac01b65ddb39ecf918515bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN32155848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d85f55f4d2c9b4512873e937d5997a92253b8965ee816e4819378f237b0d44. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN32155852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860175407a3d906965b0c9f71a18c750e604b4f1b125719e3ef9c181b37c80aa. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZHN32155840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b3f036cb08d74909ea3d6714a8fd5d8e3caab7f64ef6b4f378ea2606baa9e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32155855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef40acb7d3d0c2a203fdea694dd97f4234aefb912cd62c3ddcc773429fd84d7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32155841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e60305c98c2d9a594d6cf54774217b891d10bd42d1d24baef1aab2b7d0f23. 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/QZHN42284165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8caceb7767c605eeb7bcc9f4cc87fd09fa080090cb9fbae3a757801e246bb. 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/QZFZ32339529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8c27ca70d9747f39cca667f88f2548169e6332819c6cda6d9c1ed4aa42b572. 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/QZFZ32341215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7dae6701eddb8f36c28a2ac8cae5df09eaf4ac8cb7e8beaf0ab58da876359a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42388770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0cfb0b78c36d2ae8d5207ba7279a900d4e3647478e24a376454384f753956f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZTBA2459978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5d1d27f9a140152f08511b9141578e394b6c98e5f09740311c6780318f6013. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBC2457727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cde2e8f13f8abc9d0d96f693f5fedb72fcf055b4ec7d88afabae908b932a11. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZZ7M2485387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32868b5b8e31e2bd69bc3a87085134a9726f9133c29474d60a01cc6d7e0c6f9d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7M2485379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc435c661c93ad921ba7f5992224b9f572be1b2a0c45b3e9e50a7eccc0b64490. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZZ7M2484060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec61b08262b7d07e8adee753d76e486cea1664c05690ce6887fca91ccaba4a1f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZZ7M2485386.