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 0x4582132433ebfe6a3cc2b59bdbd3a9337363a8d5b5f4344c99e9756fb348efb9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d008b3f-0c58-4d88-8e5c-dd67ff390b7d.json and https://artists.proofprofile.net/proofs/artist/8d008b3f-0c58-4d88-8e5c-dd67ff390b7d.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 0x77bb165cf0d6f62adfdaa7755ead99d4d8d1264e43ffa6e9c419193206ab280d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYHM2426279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6a940c64b706b84fa0ac354e55638d07a1ab1a9fc6a32aa099c8cea3e836f. 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/QZYHM2426283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2ee95685b03b09b12b77fc1b4b00fbf1f600409aeb093803f3396dc96b011. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZYHM2426287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a244146205a2d775ab7cb85c069f0baf86c444e6f6db2372bb8df92be2ea8. 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/QZYHM2426289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3c4a31468ae0e07b094a78f8a5f44bbc2501d4785c5b47c457ce42bb086e1. 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/QZZ772496386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4d3468ef8680c35bee5a443ecf28cbd6514a3449e27433d11d6fa9c781003e. 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/QZYHM2426884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcabcedbd789ea95f2ca0abb818d0c97f5daa77e72104cb1d26c476d93f9a20. 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/QZYHM2427009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ebc7e046288f5c334befc8d97aafd7b10367cdbd74d07a1842b859e0e892f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:36:55Z), 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/QZYHM2427014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed00847825ffe9852fcd672b4d71e5b07f795eca39c3a604d8ec255ed815f76. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:11Z), 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/QZYHM2426702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74be22db8c0819d2039c55c747f4e3e2e11e45e1c9004ab09c806dcf74b9e7a0. 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/QZYHM2426708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37b8fd2d946ae040e191959db5f815f59a63432a5686e69783dbe8677ef8cd. 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/QZYHM2427385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c52c78f3912f1b5447b1747efdafd12de6ccdb38476707b969f8d6c491959d2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZYHM2427562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995f275617a724879934013c1f7171b7c52b24a247bc20ba4f5acfd89b810dc. 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/QZYHM2429198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360327e81aa1f342f01b78e751c8da8f9a0090261104dd740a0f9c4a67fa88db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZYHM2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97197ac6d2b0e541afa95d57edb6119442622d431346b0c116cfd230f3890054. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3EY2529354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e5e102a43846b27cfe18f00c57616fea2b55defdbf410c9bb5e6e7cfcee970. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:50Z), 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/QT3EY2529361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec058cd0a72c0ed46c23dc794672ac16c236ff238091a2ae62bf0d2b3aaf8170. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F42540074.