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 0xda90af9cf888de57161a6bf9dc36645360852b77f798945a2e7f6ccac7d4f3cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68e7a2e5-a628-413e-9c73-aa3ba1dd847c.json and https://artists.proofprofile.net/proofs/artist/68e7a2e5-a628-413e-9c73-aa3ba1dd847c.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 0x7976825d05031bc956e00a3daab32819cb4d1283875fc9a44df6b995cfe244cd. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/DEVL11900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216f8d1d485de1711306897165d8cf199506cd4ad36007f40aacd933a9f4e3c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEVL11900479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c979fa807627b0c716cd5783bff166579686156f2c950e005c3cfb249a756. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEVL11900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50a624c09a7d74134246ba44f27d37a31fc03b994c813ccef991b35b1fcef08. 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/DEVL11900482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e09596706c8ac0ebf4d17872e6fdecc05b52cbee523e56e5faeb85c447ac6a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES72095506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e8aa0c23f91791f473c11105eb450783c07759e26ff4cdb7d3389ba6fe9bdb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:14Z), 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/QZK6Q2026336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d7b6e95d1c16d1bc2d789fe4a636714a47bcfa1c36928ef3b79bd6527f668f. 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/QZMEN2003541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204392d1e399946a9707874a11b318fe7d41645ca5c6033bdba3bb78db04fb1d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA82141206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e93d48c598c115484c7e3dc4d15198a1b79d1aa8bfd6b1784de9a4cea7d91af. 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/QZDA82143255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda033c29c4b91c21a31a733db3068d232d711eb722ae46c80385615ee596df. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA82142226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c3827af891758e5a19502b80bae3875fca6aeab6f3f61880d5232c0cc0b3c8. 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/QZDA82144462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74379656a3fddb5fe81efe19df2811c74e5c7b1188b837cd43ed2aad3d41b597. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYZ2045835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb44bcaf24f87fd1779880c0228b654e6c82d3c67cdc416c75a8f3a30c16ab0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA82142229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fda0719047070e27dd50641321e77a16a18526983782e6be6552b42dbbd52. 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/QZES72107074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a34bdd0e5330597e97c2ac822022830616f95a20c30057bb37151a66329c0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHN62179478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7f0b2ed842b084962c2394787718b636aa035dc83d8d28bf149c2e8f37aaa2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFYY2264579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb369cddf8937174519ec5e72b894a2b1de54a625a2823322c99152db2c1f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6K2277021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f40fc55ad96a6ab8ac4cb4735f76f67cb322f6a4545ac7e3330ce8578d06928. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWX2325733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8567bea8b2eddf9f31e680a092292f10c57034e76167082f23aae61d3d9092. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92293894.