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 0x177dac8d1a95757cfb8988c9719b23c1b8764e8f8c3bf86d57faa4674b6ac06a. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6186bda1-10c0-4c54-90f4-39fb41af2481.json and https://artists.proofprofile.net/proofs/artist/6186bda1-10c0-4c54-90f4-39fb41af2481.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 0xe872ca481575662a5c58a46209b69e7f42c7d1e06e25d846d03ad7a07e2dba61. 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/QZMEP2283554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155287150bee5305e4c50d22e190ae32ee42a0890a3c5fc1a9cbe538af3a7ff5. 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/QZFZ62368770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc348611acb9bf193cf28d52636bd764d30697a589f0487e84d97b9e21bf240. 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/QZHNB2490861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbf27a123ba3fe14096f2985569d1d85f2e77212e4802bd91e92e908d4b2c0. 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/QZHNC2440139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852946c592d0dc41bccb714a88427e71494e0dc9caeefa7e7d75ae84644bb172. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZES82200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1f967b9d6030521270f15b3c7dfb77da1ff3e5963726d29d861d35c66a7d95. 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/QZHNB2489529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb491733e429679b2e3b238f23d02521bdb56e2044e8a865155ca5cbaf4c57c3d. 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/QZNWR2266599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4d3eaf88e2dd27bda3213f74788b2a395e5f7cfc3b57a8e7338c58282b8bde. 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/QZRP42475265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e3f138eec2330e41be334818400a334d3100c0f96f61fe3f59be5459d9650. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES72258009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29282721ffe07a7104d7b6ae111e60814eb0c206ef747dfe94484de9e1d8670. 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/QZES72258014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fcc6d59d6db025323796968c7ce3db58e664dbe43e9422ffb70287b5a5a9c. 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/QZFZ72309731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d14b985c33d66fcbc7b2f25216df7d3b1a22ca3912c0cbe3a66a1b58dc8492b. 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/QZFZ32521892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815eee744fcb28749a4ca4811f5f48cf76b1fa608bb65a321f2d26662b4b6c90. 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/QZFZ32524401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d32fb7951135265f27da0148e6eed8e545319ab4c8391569dce596ee1b3d9d2. 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/QZFZ42576988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08bb784976561c816513ef5a3af3d099a812fcd63ec22fc70c70add18c82ac. 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/QZMEM2558252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95414d0e5fedffa037dd4b0591b54d8bda1c599d4eb29698ee31c948d558c62f. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZMEM2556717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e122d092df87d1764c750a716b58e2107203515b45cc9a9ca9aa8bb22af88c8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFG2523289.