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 0x233289d99d0af829307625cb29024575d2d0af7f39e6608e322f78ae97021d87. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b89d1828-cfbd-4c49-b56c-a62e18f314eb.json and https://artists.proofprofile.net/proofs/artist/b89d1828-cfbd-4c49-b56c-a62e18f314eb.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 0x5f086d16145179ab09b655b0093374e3a6de64134ee7e83ad892349495b1e58f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADX1815621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff41cbdc2275b1ed6907bbd96b2acf5e01c86c100eeaae5ffedf46d9c717c7c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCADX1815622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de26124584b64efd0203406cfa9d404869d7493a6a51d66942fc563eeef0aab. 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/TCADX1815623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f5753487fb669fd907eaf5862ca7f3e7e7d81e8f32e59a4cbefc7b5bef36c. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCADX1815624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd710a7d47f4c5bcec0d61631f1c54ae8daaec632feab948b414a59949ae4ea6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCADX1815626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25275c0bc5c585025e8a748454ce1c5acc322935b606252e8693dc5663bdb100. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCADX1815628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea6f76907413cd535683c21c9068b2141dbf9f48cef5d22be1c3fdd1d4869c1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADX1815629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463829806e9797c53de66be60d6609246dcadbdb3bf6d363eeb3d6d88e80cd0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCADX1815630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46702cb5b0b9468d391e04440e56fb55dbe96415f617df8980c8ac2bc041d03. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCADX1815631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd0528505f066aff7fd95cfdc5106f436c077f1da8a9634d301b012d4774026. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCADX1815632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83614da261f5379301339a316969e104ee1c8c3613a1754cfcdd36192223441. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCADX1815633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf85455b40c274bd72647aa62159bea4e26c152dae761d8306f0d45866a56e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCADX1815634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11e449d7e8a0834eff2aa8ea3685a554649034743a1cbf936d6480e992be11c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QT2VB2465305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfda7dc824cc72cf8b317e4925fba88e5669cf3c88911f6de0c53f3f22c0690. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QT2VB2465307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12bf702ec6689a91cabfd3f5769219fda29e9dcb0be375077f8caf50e97f16b. 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/QT2VB2465310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c710efacd769a1a68fd189c29020bbb8c165170c0c2eb3c7748d793458e8bb. 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/QT2VB2465865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb73b8c7ab5124a32ae288919c69eec4f9ab12f8591c169e945f3fc7cd5504. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QT2VB2465870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf820f8d4e97a50a56ffd59a214652879201ee6f1ae99e5d487973d3f39defbd. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QT2VB2465302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9376d1614d99cce9aef19d1c2a9d1a65de67edb5ce273d11dfe2292f67df02ef. 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/QT2VB2465303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28255d807f12ec11e64c88b78ce7bc7992708302bc76aab7fae4ec62d38cfb2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/AEA0D2078493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d1c5833995f9ac0c92cdabca05a89d721a7c6969c5c4e26b9bb27ef90d990. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AEA0D2078494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b185fa54b7294588c1f1ad9aaebc4b60b79b2c6cae625f6017eb569e682983. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AEA0D2078496.