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 0x434a0df1f5ef31580c520b73ec7ef895e27cdda64a709e4b875ed2f61399f364. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5d76955-fdbd-4a44-b619-1e1e8aba3c66.json and https://artists.proofprofile.net/proofs/artist/d5d76955-fdbd-4a44-b619-1e1e8aba3c66.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 0x1f3b9baaf25d66276ba0ff6f9eba715f911c20614edc31b03df9740e204536f0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBF2460810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985fcd71bff72323f5d84b8989360808e46f91b3e7c9113065ba93254a2fc89. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:02:25Z), 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/QZTBF2460812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc291b209166c25bdca0ee0dd11b0a70b0b0cb6dd86b4c3b69447432a29d1841c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZZ782405690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd50594dc88e9920646f2835687253473b674a0ca0fdacb10d6b1e1ecacbf94b. 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/QZZ782405691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8722e9b72d25b9f58528da5a70223092b769b75e9fe941d3167a22fa8312998. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:40:31Z), 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/QT3EZ2439226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf88342435476329ea39605f6c18d2e0bdeed3530cd98d458edd6e49f60c980. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/QZFZ72595816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da3e2c772d1c151434ab00d411d5bceda8d9eb643a9ca05fa021f8d70c85f3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ72595817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4449cdea520509b2dc4512f78532ce9378427b08fef4ad8f750fcd9bb8462263. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNA2555912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495041d90d314e990bcbb2b3ef523c0e2c19fab369836bb6f98721300e17cab. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:27Z), 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/QZK6Q2589726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4449cdea520509b2dc4512f78532ce9378427b08fef4ad8f750fcd9bb8462263. 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/QZHNA2555912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf921ce7daa78a54c954fed7b87811504ac37f63fd42e87a2716a1346f096d32. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2589727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dad00e2493a38119f2c909fcb01abb5966b2063fedddfce06cbe40641454ec7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:39:53Z), 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/QZK6Q2589728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acec0267dba41bc3c669f5f75d601140c19e880f59572a83d9da279eb297dca. 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/QZK6H2568761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348e92e2f88bb3a717f4c1339f2e53fdb4d9f12c09db62b5067aa9f64f4ce6c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2589731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1636406dc92c7bd27fd2e52cd37af0f0f2f7ef8f5f25c1599f281c21d9f2c63f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:36Z), 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/QZK6H2568762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417cc8b7d37b104583a0f01aa7e2f153f64b831cb730c1b9a3c1fe4a3ed8668e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q2589733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10096a671143174bd2aa8025a6acf22cd286786818b1eb277bb5218843544f9b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q2589734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5784e5ffb7fd1a0e1cac5610b4f1193e9b3218fc8b209c4f3142ddff812a0c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6Q2589735.