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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3783898574116574ea8ff1a0a71cd3869a4a91b3ec011245c38e89dd8385c09f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1472974-da03-48c7-b2a8-0764bf97b5fa.json and https://artists.proofprofile.net/proofs/artist/b1472974-da03-48c7-b2a8-0764bf97b5fa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddba0425d4bda832668aed2e3986895e228cd40ede7b57297cef30274a4bd31. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6DC1745928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c95435f6be6a761eba834b42d20fcf09c95c621b56c63e16bb15042c26c149. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6DC1745930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95de69795db54db29ef349474b938104ce98d62f3c2dffced95bb99f2aa0344a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6DC1745914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac832819b1d8d7475f7050c308886b8f151d1861a1cf237ad4592eb782bd4dd. 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/QM6DC1745917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503f529546ea7c00a746791a02688eb4c7db25715225043582de2a9053a28e1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6DC1547106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169d3fb127d021e4f93a954ae954310af8961cdd9a34ee5c5ac671881906a39. 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/QM6DC1547107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154ec493afdc82b9b8e028cd72d7e375bbd02cde1ccf148a93a45340cb054da1. 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/QM6DC1547110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d0238072c8a2dbcd9c576dccaaf17a3d4aa480a1b1530ec5340b9e55e9435. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6DC1547111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ad9ad134ae4a84d59213a4cf3dc1fa3eaa2a154e03601d0690b0c56a68dd4e. 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/QM6DC1547092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92154d956675f8318a83b38f6d32ced9f046b5392fdc3ae950d1f8132d3fbe. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:02Z), 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/QM6DC1547093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49366dda4316d72b24a083e7a5c52016f7a99cc31558eeada20e611ffd4d2cc4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM6DC1547094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75992ef31eeea44fb1ea218a938b9b1f5840d764e5748aac81633671bd7fe498. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6DC1547096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d4d5777d5b5579c140b96ff8bb0bc0e74e0349b774ca42e68f226910e62c1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6DC1547097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b90644ee21563c3f7bcaa8878cf25e64159bbb6bcad91c66137cf57c1d3367. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM6DC1547099.