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 0x759da88ba9f88fc9e7ec2b092945d98f7df3ac2bb2e7e6479e91165592b6a60d. 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/f80c5b25-b14d-4726-89e6-e1a7407cadab.json and https://artists.proofprofile.net/proofs/artist/f80c5b25-b14d-4726-89e6-e1a7407cadab.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 0x693c8e0b65e5ecc6310e51ce2b0a516234bd241f2e50bd119a7b70b56a40096e. 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/TWAN71271127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3692146f187a8e7ad4f707c4f15f2af375bf4e5ce666dd98832e27361ee05e. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TWAN71271128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc611829be78244bf368474fec909f09083684d892ec1262f8533c4dd4a783999. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:32Z), 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/TWAN71271133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa3c127892b23b74d863131c4c99a1e855e4e12e260ffabcdf49a1554fab6d. 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/TWAN71271135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6584a1fafdec286c85bd8e015901d120d2c182b885938fb912006a66a118093f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:44:58Z), 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/TWAN71271137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df1868df47a3e2f4e5a26da47b75aeb6c1d04788a4fd1ec5ff477ed8e50307. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TWAN71271325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4091e34108a3ecf99f05e0fef5689172d736542af5e7b2b0ea8cbe5328aa801. 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/TWAN71271291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3a3b703a44aff0fd7dc1b88cad06504bf64e147337a48bc41141ef31f4c40a. 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/TWAN71271292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aec8fdc531170ce902fe689bfc00146b509e547c084eea7a36229d72efac46. 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/TWAN71271295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0eb544de977cfa2bc0068b1e8c48a006368e09588e1bdfc0131f74d733638. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TWAN71271296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60748b1ead44529a44781386882de9d8104c6bd945dda02d278d599905570937. 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/TWAN71271297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aaaa40004793125491e4af005e5d859fcd65028630e31cfabf0e69088c6123. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:40Z), 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/TWAN71271298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb43a503ae8866562faa1e63b519ad24bca1241294a685abca4ea73a3788294. 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/TWAN71271301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c372ee6fdeda977445d77092c6e819820f8bf6acdab29d1472b9ec9c3f90c6. 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/TWAN71271302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d89d07bfe66d93f315b105344cdc847975d3836ff9b79b3f8d58d6993203f. 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/TWAN71220191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71689db05fe280de692d02b0c1e54e1416cc8112fe8e4e026cd6f7be3c5d248b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:42Z), 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/TWAN71220198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782054448a20f8a8c76c2e2029dc019c9c9357faace744a57269d5d913d4fd0f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TWAN71271139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b076c27e74416f7d5d63f0d403830936203eaf3dd76c27445362b76b2072805. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:37Z), 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/TWAN71271145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9d6458f132c7bd3365454fb7c085b9700699a661ec1ffaac45ff58c49a7921. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWAN71221137.