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 0xd1fc136999213af49c9e1b03feafe9830795182f35a7ef19ec6422fc1bf412d2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5505aed-a0cb-4e88-85d3-380fc11e603f.json and https://artists.proofprofile.net/proofs/artist/f5505aed-a0cb-4e88-85d3-380fc11e603f.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 0x9fcd2f0436eeb4c52b2e405e6f241b7abfe8d3f479921ee097d182282ba59eaf. 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/FI7S51800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8f0a989fd728b9a667d3b15f2c1546b57fb8979f609e1091bfe81bc0edbb55. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FI7S51800048.
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 0x40db954e91e6bd2bd7b865bd2e12eeaa07aea4c5503e472d3d3f417c6de077cb. 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/FI7S51800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710942e3cc7da86c5ddfa942b03cfaa787022dc009d88af8a481a61d502da477. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FI7S51800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa2c30d93a934ea22da4c1bc1f4396f5912feb5ded800d22387fccbd0b9e2a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FI7S51800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed4234f4d4920330266d98c35408cf04adcb74d2f198cb3326040257c7d008d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USN681410095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ef79d8149a4a6b3dcec8e34557eb26f6bd24c6e124f551e4ea8c6d863260b6. 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/USN681410096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8175cf841d519c2079f33af5ed3b46f279fb05add0514c2f54566936a9efd0bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:49:23Z), 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/USN681410097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe71e1797b98a0289b245335066c4c2382214b6a9983a4581789731bd6139434. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USN681410098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bce3731d386d649164d87aaff7f53e965947992803ee66d0c62353b2bd9893. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USN681410099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f25e6184c0c614c8405f251ef104f8f03793cc4a8f145e71a4e9eec9daf3e. 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/USN681210040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b7e4cba50a6fb2ab7a7e4805136d988da7c3d34489f2c3dd4970780c20cf1. 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/USN681210041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da8f12ff9f73078b2600c33a57f1a8a54f355136fbfba4611ddc92fb6c3da34. 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/USN681210043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a230df5a2732c134e258b3aeda98a8207b8ac1862693aa78b51fcc91bfcd58. 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/USN681210044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde407af5f2138d7affa1815c2a5d83e7292a02c5f64a59a4b66946006bc1e1f2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USN681210042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17befe7295db93b61ad276ecdb420dd8ca1b91e06a075a049c7897e9f99ba34. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USN681210039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e070207690681b3205ad89071495eacb7828935f03a2fca450f93466cb3d54f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ1114371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9122175db1b451042170c2cadf6aafa5a259e2aef7b333a8ed67a058fae99b. 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/USCGJ1114374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64163f8e408a2a466bc48b428a8ec4f8eecf91bf0972cfbcf89f9962c73bd2f3. 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/USCGJ1114375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4be4bc795f7c49b5cd2ed936c8838d1256448d8ef8c558846802522d51b208. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ1114376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28edafe2f026205c9951e745c13d5ed0f3967b0c8d3d307d4abd44c2f873b7ce. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGJ1114372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f897f888e1bcd8ed70857360755bf16405b14956c717dab86f0ef520fb0aea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGJ1114373.