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 0xabda484f9855a8962dc60387ec4e0663d3ea0cd5e0f93f54a8da76ad04d31909. 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/ca35456c-6615-49af-9877-f03d776725ce.json and https://artists.proofprofile.net/proofs/artist/ca35456c-6615-49af-9877-f03d776725ce.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 0x066f4a118c83b54ea16fce13fc7b69932f353da6af3c8c07096b124f8fce2731. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ARC2C1710015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1a9cd1743c3d06930155ebd9501d00931cafa82fec64bab0af9db87b6b5f93. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:41Z), 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/ARC2C1710016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a60876e752e61b1d92801669af517bbefb57e4caed713323bfe3270d99eebfb. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ARC2C1710017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6249bdc33a371492bb326e4658fe775f7f34d5de5e8dedbce8e04e21c8a57e7f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:32:55Z), 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/ARC2C1710018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fd4ca4284c8e510f942646aa14e01cfde6ab55c22b4694fd8aaae9b5065076. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:51:59Z), 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/ARC2C1710020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc3b92772995accfa8e67f6e223c21fa43694ca495066c315c06c7067182ba4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARC2C1710023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36065b1837350791ea064988e4f8c92b110281652d938290118ea412c4754cdd. 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/ARC2C1710024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3cc135e031d230a83f1e39796727c93db9ce58e13eb00cc3d4ba1410e48c4. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ARF101100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee19d84bf4ecb50dc3b7504a4ff1aec16fb882ab5c2a60e1e8e1bcc9fb196e6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARF101100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9155fe09974d7a8f078c3e3d22d48084c04bf197bd89d9b2f346d485550c5bd8. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ARF101100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d56ca81c1aa200e47ca4b9902436d4a8de7545a38d4bece54768ffdf12ff331. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ARF101100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f153caf812f6e0bc01aabc455a359de6ed447188773b1e4e20da1a28228bb4. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:20:43Z), 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/ARF101100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239bc60ba8d5c03c6b669e22be8e0ab320dc47d26718fdb224fbfb0b04668ec8. 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/ARF101100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80502d8290a6a56e9b99abe84a3215b5b0a7a0d3e27ce087f3779a1a49a9aa33. 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/ARF101100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb70b7c51e7c08430cd9d3a9d010f489fa4c8c1d1467fa0a91bfb99a6264f80. 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/ARF101300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc363163d9a3b0fe699801dda04ba633f0d18b4a9bd8b80a753373d8e6dcc887. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:30:34Z), 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/ARF101300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7fb8794e8503563514e1cd5ef43d29ae3340f13d2b782f2008ca310f8c2b50. 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/ARF101300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fea11adeb55310441ece268322e1d75b9356f007732e7a92da00db1143cf3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:05Z), 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/ARF101700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6af04091c10d23414217b8fa8d061d5608783d8e5d194ad6c6196195334d78d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ARAE52500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd278f0f6d17eda0865faf979e84b3674b1f9df2a09acb66f3f523b15c6a4b258. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ARB621700001.