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 0x804d2d719dce3015d60cbb9f30744cc234f7d2c75a3f7f8ff1c04812aaf08a72. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07f30bbc-a42f-4fca-985b-d401336cb6a6.json and https://artists.proofprofile.net/proofs/artist/07f30bbc-a42f-4fca-985b-d401336cb6a6.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 0xb2c86dedfad5c5dc75dfc756ffe6f1124f379ba75d4254fc443aa1a74cce8720. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BGA472319999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95486376af3ef8ddd2c79dc527b63c29088629b0d983ae37b444b8714daa91f5. 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/BGA472321424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1529897103ba4e8a80616e0039d2ed28ff07626691e76f28310eb5ad9fb64c6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BGA472314169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202e738303e721470a1d1ed2379e3f61fa61e81155f4c98bc5a0ff1f596e41f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BGA472317981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933fa9d096399c3861194a04ab94f4f6b0a6acd417d37bf034887e7f65cebded. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BGA472318970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce2dbf33d228a2e23bc66b444b3ebae4fd0c1b4c69bfc1108ef070086b89316. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BGA472321241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34042857cb2b63ce271928cc918671333b2832d38076cfe4bad6ec096f8b95. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BGA472319512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b351ea01436326c9a773e866cab97d655df136ef08b30e00250342cc7640e7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BGA472317583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d56530d20c194fc71fed20f7144dde04fced96b5a798650318946dfb3dce3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BGA472313494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ff9410952a4cab6d2fc31fbc97eaf4108cdea21b5a24bc089dd96ec1be6e82. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BGA472324714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f8cd52128677576157cd10b43bb7135bf03f01470305c422eff6004a691c5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BGA472318281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219510ed42cd23c1330af3008f6ee54f3295fe29665caccd154a23e326f78fc8. 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/BGA472322000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad23779d2001ce2396d83ce1f9d9c1c299a94ec5140b7145531e2e75169fa8. 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/BGA472319729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971c6f0b267862a7fe5bce71296b34691596bf09e44294c30fbd24d82deb165. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BGA472318226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b368fc13db325557191d2a3ff4dcbafa09eb13265718cdf94cdc29e69e2d5d. 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/BGA472318591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d303bd1c9079080260784df2be0cc78a5753e40d8035f83e144f1942965f90e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BGA472312733.