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 0x7b2b42122a9a4fdf88b677f2e720e0f3e5846a463564a0c9bbb10c16e63275a4. 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/1722a008-44f7-4cab-94dd-6bb383b9c12c.json and https://artists.proofprofile.net/proofs/artist/1722a008-44f7-4cab-94dd-6bb383b9c12c.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 0x388ddfdfa666de4bad172e24521b5bd274e427abc744dc94258e2942d3dc06d0. 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/FRR640300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c8e9179fa95d3a7b70d67eba22a5ad6645e4e2990673c318ed5ad28c23aeb. 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/FRR640300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affb5091ec3e34df118886c3b47a80fcec56e6488f93a1173442ff6d093708a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRR640300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a29dd0f1cf668d1a24229eef703b2a5ce8b7f77e33151c7e5cc44404bfa477e. 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/FRR640300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ddfdfa666de4bad172e24521b5bd274e427abc744dc94258e2942d3dc06d0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRR640300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c8e9179fa95d3a7b70d67eba22a5ad6645e4e2990673c318ed5ad28c23aeb. 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/FRR640300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c73cba51cb39f70928bc18b3ea8cd5b9eebf025a9aa6f5e78e4d23839b39c. 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/FRR640300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affb5091ec3e34df118886c3b47a80fcec56e6488f93a1173442ff6d093708a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRR640300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d482bc9aa5fe011eabf1df9c5c97c9af202593bb6c8caf46b64fc6be8b8a1d5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRR640300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a29dd0f1cf668d1a24229eef703b2a5ce8b7f77e33151c7e5cc44404bfa477e. 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/FRR640300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b64a3fd44cb9f56bb82c4199819cde5a285da5a56cf3758c77b745d6d7266e. 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/FRR640300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052b873ad7c903192cd0c59151b7f37f5140e6d3d7f7dc921f019c3b0d7bce9c. 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/FRR640600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b64a3fd44cb9f56bb82c4199819cde5a285da5a56cf3758c77b745d6d7266e. 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/FRR640300046.