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 0x11f53e67d88b33b83db53958b1dde5499fdc1abb6165cbca8aa2eb6b6bda44ac. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bf5c031-ae70-42ff-b0c8-c8542bf2662d.json and https://artists.proofprofile.net/proofs/artist/7bf5c031-ae70-42ff-b0c8-c8542bf2662d.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 0x69a15a00af566dd3516ed80b6c4f05b864adee0acde9d2034b798acd0e861afc. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TLVEM2469134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be935c63c835dbdcad79a93e12cd4e8358e9dccb49a479f9a3d48503823d199. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TLVEM2473409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4111457e4b90339cc229d76032774f3c328d039231faf74002db2e02aaa1998. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TLVEM2475253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cc9fee940dfa32caff793f9ba1b58c1ed635aaffa682eb8b3bd82aa3ceccf. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TLVEM2484303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8216a52a7daa327ed302ea53b0a30d52cde3bd312a8de7905c0ab3bd382736c3. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QT2VB2405825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e24732061cf52a9a961312e86de230892dad2f554e6142e406defa933eb10. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT2VB2411794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5fb9da711c469c1b77454372dd3c6d20d2d7f57bf0c6f26bbd8a773f1ca1a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:46Z), 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/QT2VB2413362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70126bc51c56ac665565163c13323f998919d2783672d5d52c7732cd983276c9. 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/QT2VB2415426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d8685596995359f9cad93d1e864eea541f8f220b074afbc5646a1c1d0b79d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2416378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c555289eab47143394433e5b6ac16286539df4e9bfee9fc1e8fc90d58887682. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT2VB2418420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9d7fd816f4729cde0727f291477a637c7d956aa8407bfe20ad5e548371d5df. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QT2VB2425446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25fe8b99515e33e14e95350c9fbbd4732a4cf042e15e79b32ccd47c2d42cae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT2VB2430475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf235c5bd4792a4af69e948592291c45688b444d1ec93b2a14f5e1a0995ffdb64. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:41:13Z), 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/QT2VB2433494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cddfd5009121f6fc5d1e40a6cb6a875c1f4e73482d72590e23ec49781574f8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT2VB2438456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1859d45480cac9b28e59088f503da51b3441dc9067b649f8f4b9c63ddbc28286. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QT2VB2441003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17071c1d45bdaa056732dd822e98824933b3fbe435cb1c1d2299e76e02f1dfb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT2VB2448066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c87ac4b2d0306cddb557ac9d2e92651e9df25d4884c6052592f56e0cc4a42b1. 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/QT2VB2449526.