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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce6a7404ef8eb03775fb98e3bb10a93c7806694178ce016bc84c83b0c1e594. 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/67c825e6-e7e0-4cbe-b02e-b1a6fcad0215.json and https://artists.proofprofile.net/proofs/artist/67c825e6-e7e0-4cbe-b02e-b1a6fcad0215.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa956630853de72a5cebf50a9b11e6c978d8195c7455563e16f344e211531ea. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RSA221830188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc289cded154fe683c0fdf40475b1b71ea51f9286eea1f4256c003a06ce9a6be1. 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/RSA221830190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846177a3273084fde8bb264136378486cd43caa424892ab7bc43d5f6d399dc1e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/RSA221830195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f2d5b9f4bece5e77ecd5b4d46cf5758e28bcdcd0101ce1fdedda965c945807. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RSA221830198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fb118e3faf07023fadb43004dae10dc9546c3a38415467aca6db1094bbdb6. 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/RSA221830365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34572fba66cc3da1c6efa605f3fccd44571e7a08c080818c7c5f8ff3a6d7167. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:25Z), 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/RSA221830373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9385da5830fa7067b17c68483f5c9e15948781f53bf4b4ff9fb1830bfbeb98. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/RSA221830375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966eb4c05a6b171e5113f87dd4965d01d0ae801f33a11477547c939f2cd193c4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:48Z), 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/RSA221600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad577b371f34b85d7aeafe24c54b857a2088f8c78e8b20c784170d226fa27e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RSA221701298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf936e8d18b47303066b78820f88ec2273dca8f44bd00ec4de778e099b20ba. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA221701300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5eb6fd503eb334d3191259e1d9273c2efde0c2d6fa436391d92689781e94bc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RSA221701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a0f7e396b5b524409e2f0c46421c315099c6d21a254051c8b8bc4740f81403. 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/RSA221701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2bd4d562f5aae548c35091f40573328a8dc7d656cafc39e1dbaed1286cb80. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RSA221701308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071162996cfcab34b9d3e2fac58d692adc560195be63d48c37eafb4850f61564. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2X42262584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53868757fd9de870c3aacefa88bb0cb999a54843753a9c06aebcd6b536c51dd. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:21:28Z), 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/FR2X42359812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9655621659422deb53b8c41fa968577d79afb96bc378f8b757fc6da402a31ab7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0R2335574.