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 0xe34a430c20e87f01aa663aef4a25254ce72b591f762c2a6979e5b7bd857eb8f6. 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/2fdf5e50-3f2d-44ca-869f-882b5f12003e.json and https://artists.proofprofile.net/proofs/artist/2fdf5e50-3f2d-44ca-869f-882b5f12003e.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 0x1390497d32772164d4425e718ec53015704df233839790f5b2b2bfe0349d3934. 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/FRX282330653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3fe7d0a08d74c9bf681229c3e31401e35efcefbcab6ccd2261242d3b3be48. 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/FRX282330654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e75b1114965bdb9fd2693ee73c0c27d7887554619ff31229dc34fb109847d. 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/FRX282330655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504c5c2803ea620fc544dac5e4fb4b8d56a381afa38abe73ec7e9e6f139f2d1. 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/FRX282330656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cef68c398b2a5068ac5e82e181c5f7b03416ee15cd40fbc093626821cc6331. 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/FRX282330657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a87bf12b594d7efdeb685817708cd13a489583b9f531e19aa09dd8aa91cae7. 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/FRX282330658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d0789d65b0b1c0f3462095a1843faf7db08cbe516312f9d9d532b927f67d47. 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/FRX282330659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d593022b8c77f76630eabf73bd93f48b4678f5fe39e882c062197a3e6f453c. 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/QZW9L2237183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ed663a22db9292d90002d77723abc138217a9529545e3cc730a8b54934e9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2237184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f55993192025350405d2a588e79cd39f6e2b4768a43beff038c587ad68486. 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/QZW9L2237185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8ea694eb30948d60d5ef2441d4cf209914a5c9c273c494a03cbeedc58fbc35. 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/QZW9L2237186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84bc42f957286dc5390c6189ba961e3e5cdb1341a16a40d6fa8535cd6605ed. 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/US7VG2301622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ff4b01683423b750d74c4aab7a39bca20bb4658f27163c4da9bf5c91f1d436. 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/US7VG2301623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf09366fa397a4ea976c21371aded1cedc0ad5cfcaa2b69f8a2e88f04ebce49c. 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/US7VG2301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80197c07a8f4b5a3d34396c82a6397a0aeeae6b6f7b4835e89b0998b251b13e. 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/US7VG2301618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30645dde8815e213284f487a6e1d1ec9cdf6c0a2cdb87c839e6cd2db7ec6089. 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/US7VG2301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c1f3f3b753bd8aa206b21f2c11dbd173f1118405721a90daf097d0dfdc779. 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/US7VG2301621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7ecd89358431ab2857e768159caefb22c991d6d9139cf858f68552713d825d. 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/US7VG2301619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309fac9120138d6516617d984a783ce40bb39f16cfda6aa7c087a3e2847685ec. 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/TCAHN2363347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b01bb012b2a812291282cd6fee7286f33557776980aeb26e9d1cbbe048e1a48. 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/TCAHN2363364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9451768a4b1fcbecc98e7da1c25e4a7c3144a5c1f60f3b4a58677de334bb54ac. 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/TCAHN2363371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c866271bf2cf70eec7f7c1f6725674922faa0b47ff1da3955ed267fbf8a0371. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHN2363377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4be27922d7b47e755f6caa11b7b4a5c5d395fb3acc100bf7b6f520c6d1bb41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHN2363389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c5e26aa443c0cb0856bc53fb2df499c8124442423d1fde90ec0fef3e5e3ae. 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/QZNJZ2360273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89926d1f28f593d244b21fb1b3e2b3590f186fb3aa84d5e5ec9cb3cba03b1297. 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/QZNJW2373716.