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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ed38c41a508df8d20dfd008916a4ea7bf6222630aaf3ca8c6ffc02ca28d92. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81db2b14-7fbf-4a1c-bec5-9d90956c9f45.json and https://artists.proofprofile.net/proofs/artist/81db2b14-7fbf-4a1c-bec5-9d90956c9f45.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e376dbca98d1eee942c956c725419c73c8c23bcc9201109341c1ca78fdd686f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4dca36020d65c1e9ef5e03897eee60718ba01c9e9292836c77ed15813739f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068d3764eba7a8c76b183414b0ccdb3a350bb4cdb1fd97cb6485d746ac9bd96. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TX1748228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d26db638fc306a3a93166ec4ec93b18a9bbec4a04d2c69b4df5db8a1d3c9fa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX1748229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f6cd80e1b7cbcff6246d4d3702a2d26dcb42a278118a33f5618787c4b6d35. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TX1748223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107043d0bef2e83af31628851afab6e440fb3b71fb7cc68e9465ea73dd1e2a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7127643f092a1b7b7de86315845659e2c7690e80b935b21875e45b5ee6b96. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7454ccc593bbd9bb6ec6eb0914c23ad64c58553aebd82ee8639fefa0f9ccb0dd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TX1748226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb40f39aab07f0d6d713722f2aa51399737ab9b2a60627af15388f3bed9e14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535434cfeaf31e7710ae0fe4ab76d0381e1006156b044a79537aac36a669b59b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eecaa2f58a67f786fdb11daeec0d161b7fb6769a3d3a21c3f53b83e8c78478. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96176ec6c25cac1ec9ac505ff8e8be3993a113dfaae22a962c7b4b6eb9cdf872. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e555e664c71e51f432964a4ff6502e5ed37a51b65ba3a63df5a88ede16027a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626526671ab8268002624f9844cda975f28a519e092919c315717c08b438e29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fabd5a7e5b6369c7dbb9cdd0f00789683ca4def8529e5c61d1f5ae77be25157. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde44c45a8116375acbf3d93eaf05270a80420e40fe54e77a10668d452e1c40e0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX1748217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad7b26cc7b1259f6e8c9fb196fafefa42e2f72f65f0a64a2658dd726906edbc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX1748188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ddd2974f4f2314eaf542425af536cb191a1ce62336e13bf0d1aae112ec0f78. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TX1748189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d6f40b1a8fe3e486ee6946f5e4e36c6f06874b7bed3f6d21e8a9e4f535599d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadadd9dfef68a6784578fb3f559568fee7c7a5fb50078901fd59838b28f77b5e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX1748186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220978e28cec61812f2eca19ff084e5f46f21c0ba93d622473604bf33d5298ed. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM4TX1748187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c18000c494cf6652e86a175447be24bae0324d2d789a9930f034343562c3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1748016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e8ecc77ebc85ed92b9ccf55deee6daa9198021c01041019f8f8045c8133765. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX1748017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a76e7fe10a13ce70943e39d58ef899aa94ad1d3e4a72686743d0e7ea0207dd. Chain 2 (Bitcoin): anchored in block 957240 (2026-07-09T00:47:38Z), 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/QM4TX1748018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5fc9a1213db6761168047e5353ee65d70d7cd8cd15786662676a8e7b2c5dfe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX1748019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861f7d00d355db10d8fb37224a3336aae855bcd19a609f283ce079be100a4eeb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2360902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f9b2615f5cb5ea21be978aab0ce93b655d80b1f849593e33b9cf685ae0beff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8KD2311558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888f61f0aa3d8636e37f1e63d1b94ff681be32e278e0f82cdb63863f8f69d2a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2323749.