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 0x83d6d55011064d6ff6d1de5141a3c9206db9f787aa26a635e8bacaf17a2bdb47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6a4c7b6-8571-4533-9507-c23316007a91.json and https://artists.proofprofile.net/proofs/artist/a6a4c7b6-8571-4533-9507-c23316007a91.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 0xfa9980407e4543d1e48eb75e501c42e0cefb6baef09cf8f1e12450a0f99a0221. 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/RUA011800372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609472670602866a6a0af12fb0d825c3ae466ccd4fa8eba870ca7e771bfca448. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/RUA011800373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e47da4432eeca7eecdb33f149fb4a89ed6123c2b65efa0910ca3c45a8008590. 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/RUA011800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b5ad91692eb6ce4c93af358a1c853fde03340f2e5b16231af18b8f40e26039. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUA011800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a3195c53f004dfab0449b57bb78a820a2d087186d11e2eda28da1beb42d3a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/RUA011800376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126393b85f4489e626914421da184b5e10de75f8453985601c6ef589afb142d6. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/RUA011800377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c82f21a28c5835e703c119c8ab8a40b4f7a9c86f680d8d5ee61d064526c492. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:50:21Z), 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/RUA011800411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258e8f8e066ee8e5ad7461333b318aed34354005867bd5de37ba13cf18c40ae0. 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/RUUM71900849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871493ab376ecc878407a322e10c5140931598f13019d260cb99a89d4c66808a. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/RUUM71900850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43756ba0efeef5ea9c4d34c797137084cde20f25e28dd43a5e70201edf5ecb52. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/RUUM71900851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782ba25061cc48a373bd27217980f5faca4d00370ca366ba48f0b67f7fb05d8d. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/RUUM71900708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3412f6f8007d0e1365c55061025dff627cb777b045028591001978147df36085. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/RUUM71900854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4335600a347d4c52fb259b1a36b6fdc65b98d3bd0d746a901b6a4fff7143e4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/RUUM71900855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2557688a495a5d0ecd41934f24f3975ab17627cfdef760f3a7a16ecbf41a9856. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:00Z), 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/RUUM71900856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b9fd09447a2d79dc656e6a9b0fa53b9daddcbceb37f4be105356a3cba4e3ad. 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/RUUM71900857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac016d6b734d7dd7dba46e3cf8283bc11ea97d4a7e0d55f2cf156076e8abcd81. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:41Z), 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/RUUM71901661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd576998fa77cbec377b865d037ac9ed2fc00b3afc4c35bc727bb50f0b21fa716. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUUM71901662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea88b98e0ebe3ec1245e7e8702a939b3f2335da96a05d685c061e476f95119. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUUM71901663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e766589c1589e753470419d99dfc79f30fe748ba07a42ce7cb6110d53d04c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/RUUM71901664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36617c2878f28ad1c0cd6a001497181c534a5cab78511623ac7ff1d825edd632. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:54Z), 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/RUUM72000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8daa018dbe5f33888e6f248ae265d0f9199c971c6043fc7ce9798ee5d0d6b7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RUUM72000594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648f173e1cd82f3e8c9136401d3ac563ac44e9797bc776e96a93d09d9646d339. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:16Z), 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/RUUM72100681.