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 0x05ac60f32c4c1ee331efe4ec3ef00e2512c017eae9fb35cf4ae0dce984d78e04. 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/f79d6bf7-79e1-4b09-9a63-15d9e88189d4.json and https://artists.proofprofile.net/proofs/artist/f79d6bf7-79e1-4b09-9a63-15d9e88189d4.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 0x23f7ef59053d9d63c726ed5ce56e5af4ca459f8aebe5dbb53de12b3fe1444db1. 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/CH6541640013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8889c468ab05227e37c4fff208b01465a0aba75ae083f04a5b9552a6682a6e3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/LBA132401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c58efe7563d81e89771e4dbbbc1958388e847eff54259ba878c8a8d689c5a12. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/LBA132401885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8832262fe158cf3a8206e628bf859b06e9050f5249454ddca5258af44caa72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA132401902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f833dafbf8239714d39826b76947bb4ef41ef121a266534c0f6ffd20cd2300e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBLPF6683531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e34cfbafc50654f9580d72b7191762df80ab528ad737f8ff50c1ec478fbbc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBLPF6694716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f4b69c555ffb06047e22585834459d142c21ed1d318f98e8cc00a71a42efac. 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/GBLPF6699157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e705168f1d32b77eb1320771441abea8544583ee6abb29f7710f3e3edcd35. 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/GBLPF6727431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabde778e9826d2569a2f8c44e2f4ac7b621a4d25d9ec9918150fd6b06ed9570. 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/GBLPF6734300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18052ac35d1c1339bc447221d6869554fa4d4ad57621c0bd3d64b2d5161141c1. 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/GBLPF6778882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95631736bde99f69d19495a84ce4c7d773a53861bed0fd4e5327be7903363c34. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLPF6792725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c214af775af36a83edf91931bb665e71d4c86151e24d84fb7f64e4f3bbe8a8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBLPF6797213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7d6bd6ebad854754d21c23ca064364b9bd8b6114b1248d4c44d46f0246849. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/LBA132401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fa1ea59ff109e2606d03b71d0884a4359c4631b8643ac24c6b1241ed704b52. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/LBA132401933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116dff3203a5e81fa8d47c774a7f01f310bd228e099a74b3d42d97858ff4d249. 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/LBA132500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6635accb2da4e3de058af6ad009ab4791fd086c992bcb397a4e8d49ce4d4ff1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/LBA132500297.