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 0x5296657b14b526bc6675990811d189dc49ee8dd568f8824ee9eda82f165ea85d. 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/f8e2cebc-7220-43cc-976a-873df38e6381.json and https://artists.proofprofile.net/proofs/artist/f8e2cebc-7220-43cc-976a-873df38e6381.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 0x92efd0e10dd6ebebcd07ad487bd1696779d8fd1c31048965676a1737fa524258. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR10S2560535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b26161a3d4c9b709e15af9edf01e469057fd1c54aaff5a45d61fbd7d8a926. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FR10S2560239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c3b88f116efdf0e4cabc0f82e063185dc5a0608a4fde893e009449aa8daae. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH6451500544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870aacf9ab2dc205dfb72afe5e61d1eec10515ee2b0d9f79aed165c61616b42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6451500549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38dfcb559abb5cee690c14a66e31c96d14965ff04bd32d288bb00c2853d70f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541767156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492a50b87e29531e436b7846dbbfab26085fd5f545b4b1c6aa6bf07af0164df8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541767158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7c433882ab95aa9577e9285094828e305149a027cea725c035b218aa044605. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR59R1829139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb17def57778f8412fd8962e44dadc2ee78c8be1c04cc7ae07df8e010f142cf6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR96X1855639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1d926e62ea7c041551d9e65eceabbdc03d6845291f82e72594f8dd5bc4f90. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR10S1922302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e29ae9eb9af7c0ca2e9a192fd8753b4f5d63213afb234111a78b841af128c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S1922309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009ee74571e29d2869507af7ca0565c5192cb4d04d604fdabc009bddb633a951. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAEO1981259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7683e16bcf32126de48b4abc5bae0357a4f868ca40beb911d0fbaf735f6172. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX281902113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540b82b31ae43b12f9476a3edc0632e63dc5825bd8bca45e1efaa5fa9ab278c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FRX762035176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9b570a4805867cf6de2a6705456f38aa97b4bc051f733ed63a843bfbbea6cb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X42188456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3480c2d0e2b1bb4e493970a646295364e1ecdfbd7f94380c551fe1218e3748b0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX202129131.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d577bc0088d77f000020407aa142bb60bee7b2ba2dd220dffa0148e9da47500. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM7G92045400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa644961400143ede415a25d910d93b2337cafc3fc1209cf11506fef21ccd523d. 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/ROBRA2300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a9e0d609389cbf7f41ec818f43c5d0b9cbafaea827daade1d3ba981f960d5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROBRA2401836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b8e5e12b524ff19640f3fd55eb233a6067d5f9e6bf69bfd69c394c98f832d1. 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/GX5MX2174069.