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 0xf2a18e8a05e3554822af5e652bd880965d6afba5a4aa2e9af5c6b98ea8dc8729. 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/3ee96a56-7995-4e90-bfb3-cff9cedf595a.json and https://artists.proofprofile.net/proofs/artist/3ee96a56-7995-4e90-bfb3-cff9cedf595a.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 0x99c943fbbb0f4fe9796da51b234a8ba9c9bfcae3c1ffb0d540e723f596335249. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZPB12300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b024dca890d335f3803d2bf3d961f9c468cefb17721cde1eba8f2dca2e01c3f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM82297462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef47eec267258015401da35c11bde9a1828ce46d0e677a1ceab1e92638e7a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM92110836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2626e68759cc0743b80790779779d655f2a40e5a42379482047f67c16a01813d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM92110837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a70a9631c62f1d09c478f427ba156feac29393ddeccd28417087103875faf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM92110838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca9a9aa29c016da4b4f4efa790a5be2b13e12532e377cca7d398bbe8b9c2eb. 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/USHM92110839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d92b272e440e4a0a213435f9097c25acf38c3c82428fae01be3e30d77e8948. 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/USHM92110840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233d02cdb39250ffcfe6af666496566d9cd012a73ab20d8ad06845cd80e4d0a7. 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/USHM92110841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c86180ec5ada6038093e460ebad602ae0e472736b30f13eee0b27819bbaad8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ2164694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0181c80fd5ea7e87f4af9d316eec3369148d38592acf49321a12586f66b1026. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42027570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d5582599478e29e3273cd912070afbc2d978ca524386eb98a5d02ea09eeaf5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY42027571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0542f0dc7c0cd5d782c3d1b4f0682d253d6746649929588e9cca78853647e618. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42027572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa35605959c333598ee47ed565d6e3dd833eeacf892801bda5ef3f47ce94bcf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42027573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec4011c7ba2aad7b1b1bbc79172a0ac015562b6558bbc2ba7bebc9759d0427. 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/USCGH2018805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201b5e9951fb55939ecbc7189eb88b2d5ebfcb211641352c914e14d5687bb487. 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/USL4Q1944114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec4011c7ba2aad7b1b1bbc79172a0ac015562b6558bbc2ba7bebc9759d0427. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2018805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201b5e9951fb55939ecbc7189eb88b2d5ebfcb211641352c914e14d5687bb487. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USL4Q1944114.