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 0x655656f6103d6f1eb6881f1c5c27818dd63b1712fb9318ec8e8ac8ce094ecc42. 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/22dfcb08-8d90-4f90-b5e4-3a4e53dfc0ba.json and https://artists.proofprofile.net/proofs/artist/22dfcb08-8d90-4f90-b5e4-3a4e53dfc0ba.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 0x7295690d55cda6943d7a6d9990b6303e9653efa5567ae108de62840bf3f24fa1. 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/QZHNC2011654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf9151d793623cbf51633cdb016bc08fd55c86f45049595a9984477a020caae. 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/SE6SA2140607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf345be10874f937b4a7a4fee421e4dd60a2bef2c8a631575dae108d7ae12e256. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE6XY2162818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7895b4c5a7cee1af3308c87242960f546c4e2087d40e02633116525485c86d07. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE62M2100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db57a95b1594774329fa35fdc55e421380e71e7c7467a178a1105fa13616dd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZDA42244124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4db567e4b90ed74b7096692ce1f7dafdce1d84d4db4620964f2d653412c6bf. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE5752202652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac039712b35eaaa14e5379d7a2434e49e9887f5ffdf0efed3e15ef8f9bfdb55. 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/QMDA62347527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5b6f79fb1234fa3f8e2821a6fc96d7ac1fcb402b78eba1cacd1a73b36d6c3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SE6XY2287293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f22577e000c92bbb44412a8fe86150bc0178fda38d715df9f7b7c250b6e0d2. 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/SE6SA2236611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe623df037f1b2bafd17b0ea060ae6171c2cb23bca8dad0c46d5892eae4cf66a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMFME2388011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf449dfac33c9655029585c6e712dc95581b491f7f0957e6286edf8d1998cdcf5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMFME2388606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0baafc5cf0b0f0db20dbd46a32a3dfd3dcaf2c6c72657a009d173b7b5867b3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6I32356513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891fef871816f49a2922d2a7310a0516eb2737b3b3b861185cd303c4dd58e2b. 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/QMFME2388607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cd45f87bc10824e583513c269407394bdd466796251b900ef2531177bee37. 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/QMFME2388610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5745662363f710f64815930b8a6ceb2c7bcaafe0a48b0a6eb09c0b9c37a7ecf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA62461430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbbee4229d8894644c8998cafe5b6ac8d68ad8a914ec00a5d20c86309008b1. 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/QMDA72496031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dd7fb37cba4f12775f6b61d49e21ffc0b4219e25ca3abb725b798e801c03ea. 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/QZMZ92252798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0186c6d92e763a626834997ade478b11f122fef49fcf8b49d8888a3aefdf399. 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/DGA062489441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35720d291ba3d68a2893bca8a9f6a9769f3ad099a45a9a4757b37a5ac19da394. 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/AR0E32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61977c7b542763ec1ed8193db952246eb65a680ad048d41ce496b23ad82d1f1a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMBZ92464479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffb67b1e4fb2566804e86d02317c8e31b5b9b99909ba393a931bd4d05ff06a. 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/SE6TI2163989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87806e034e00bfffca5545ad8370233f5b129934f426b7ffdb3f7855d3d145b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLA3H2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375c141137e66df442a402c2d9bb800d3244365e736f7d24264ff60b98fc3be5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJW2364169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53145d3c400dfdb37e1b5af32ca13633cee92a90b221b9ac91a8d16e333a1b65. 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/QZW9K2475160.