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 0xad3ed9486b0733eb179c37ca7527b93d158d7d6c4fd29457af77c38f7e5c260c. 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/e306e746-ad80-4478-b1b2-efeef47456cf.json and https://artists.proofprofile.net/proofs/artist/e306e746-ad80-4478-b1b2-efeef47456cf.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 0xcd90cf7a03da795793d1ef233b567ecbce4b1e9cb59fe50e8df8715393837544. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRS182131892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0eeb590cf2a6d57c249accb0cce2e32e5cb38a035aec2639dc2d677c70f0fa. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAET2005729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e720166fb8b7a9e9ace27368224a30c17ed756377b4fcc12dc7a4522d4fff. 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/USANG2028007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b0e86fa87ca390fc3b16bf18ce52568f5d48d6bce130f7fabe2335dcb480e6. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US3DF2006192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33504dde1ab39bf028318aa6acf81ba6389bd34d6522648f59685ef8d7619121. 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/US3DF2030791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab273e04ce3035d5832b0176bf83f4e8ed6b5d151be4674dc9d8f4ec765bab1. 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/QMBZ92017997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc282ec6fb94dafaff9bef22861517cb946cdc094165227262307238b2ac451. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/US3DF2104474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c004c3e28f83d03b2e326e84c20381c9ae412a28f8cd946b3069943e33ff647. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US3DF2158435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05558cd1752852d51899d87ab8f1602fe2d88cd40ac152c40d56ef6a718cd584. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US3DF2184895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b2f7754e161aa41651d3e12ce082bea9045759106bd51cd6030b39760901fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM3DF2109713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc71dc5ac50d4067a0b01003e3bdf1abf26c6fdfb3e5bc0a30963d76258f4f9e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FRS182131887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20430255f139c04181c3a1a10859afd766f8dd0466d7afb32b456729280d554. 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/FRS182155285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54d54df1400f451a9d97c29c7dbb4651919c826d2bd660f719a7da366c03d9e. 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/FR2X42263641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc7de58cfb3ba1572906ab287f60b4c564e1c1cecc9cd21c973360a7d91a3ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42263789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f38f49edc96e38a00785d4b8331f5d97237d4da83fcfbe3f4f56562165fd9. 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/DGA082286572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ee257852dac576392ba418a93f040da9540de468f523a147657f9a8935f1e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRX762393951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfbd6e3679185b6e92d0c1637ed354b51d1b3e23e9d52c885e5375bd178319e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DGA0P2319869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56fdccf42da7ce285651e928a8f97ec7e3fc4ec717052f741f144c8d08f9fd6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IDB832403494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d50d1feb5f9d096c97c6c0e81d490913d5efdba0a914a2038e3185acd566b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDB832504214.