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 0xba4e9caff800003aa3a4aad6b5f97970af5eecef4a6a20206880086f4f092142. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f245358-e52e-4619-8fc0-feee78685209.json and https://artists.proofprofile.net/proofs/artist/6f245358-e52e-4619-8fc0-feee78685209.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 0x821b05ff8497fb15cde9af266f67b01bccdfed5f708768834190a527177d2c9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRJLS1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e5c95f0d9a4289ae7d9361c8f68c8fecc4e3c38a3a9d905573a2b146993087. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRJLS1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f58b7eb4d367cba5db89644507d21c52d00cd9f83ca2f390f6c048cfc5016. 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/BRJLS1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625dd99a7c9786964970607a201cc065ec795a5eec605c6670023e3f0ab6caa. 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/BRJLS1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a420f892b8c9b51a8d150637a013beb6ea3eb7e18962168acb79d7816f36dda. 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/BRJLS0800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c655fe97eb48247bbab0789a4f240a5245d4895e286b8e4d7a1fdcb1fde279a. 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/BR1OC1600391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586f218bd71844a8b0c09448f9eaf9e6d891f4ba6e22e8f3fe252d81548a615f. 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/BRJLS1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05e31527bf318880e8f06b0d7959342d99d3a132fd18e4a0f84118abdd10044. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRJLS1000004.
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 0x36394917199fe97f22183921aea6098a279e45b04d97d8b0bdcb83b294206834. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRJLS1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578a6123d57ed2dd09e67618f1122e765eab9eb0fd2e99a8031f6c6bd74b58c. 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/BRJLS1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444309cf5ba78fc4d6bd8b0f083a72af0c2ab74dfb8fb4504cdc3db502f363f8. 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/BRJLS1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda71254ea756b2a1f8ae0e6e13ba18c17c7bb47255b80d0f0d562d1de99feacc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRJLS1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe587eed4150e7852279305b918cd5010b755a411df7351e235185d9827b62476. 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/BR1OC1600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5944abac11259bf49624f1ac49ba2f7625aecc469f4ee9c690929cc92d3ac2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRJLS1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0b8955fe58c60bcc4439c052be5e2ec071cf24ba3bb7da56b016ebf41fbb25. 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/BRJLS1000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60629da7ba4f3c8f21af3c2f5cd8766aa46198101432348f437773ef51992321. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRJLS1000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ac90bc7eee412cd02c62998353c31beea8b1ae7ebe962caad0306152c83603. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRJLS1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf49ec0cea9766c7377836ceab6c3666d12954ca9d14c6912cb351d58367f33. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BRJLS1000545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5986bef4c8bf44a6d1f6682c21c963306967274a0354c7d0ab02427689977d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRJLS1600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5dd3ed9a91a90828afcba9cfa07b660563915a02fae7e312235eeb9ef130f. 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/BRJLS1000549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8051c07911a1b7876edfff37828147370b01f4c00ee2d5f616c6afeac50916. 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/BRJLS1600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0698a8eefee2df90ff1d27ebc578d5aa427f5282d23a24c745ed07dcc9b7db44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRJLS1000555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03bce0bfbbd67f93880eac2697ee790471784ad9020d1ad553f23a7a4e8146e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRJLS1600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cc1fb126cbe204256d9b88d52c8cbff2932c38babe4390c32d13babf05f73. 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/BRJLS1000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a158045a659a33dce28d8d15c3696572b610dfd6c783d55c0970fb923216ae. 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/BRJLS1000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810e4da384b0b8703fb44505032408794d9f995c5d43b7ea9f2c6e5700b2f75f. 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/BRJLS1600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaec54c4db4b5a454b50c599e95a69890cd44d8208659a919a084ca48f7cb8f. 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/BRJLS1100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43014b876d2c432bee9ae1e9bab24edf10f875c9b1f709d06e9b15bfccdb69bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ5AB1601044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf734f87e47acd8b89edf5ef66bb7f931791e860a8f8a8688d5af36d88bd22ef. 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/BRJLS1100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ae60741edcb94e87ae679c7cb8d9a3a5860ebb7b9203dbdd2de8fca8ee92b8. 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/BRJLS1100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc083710d154dc21514e2fc090fb5626836eee9afd31d84e1c2844e1656316. 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/QZ5AB1601046.