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 0x23571a9545e2abcfd0a878ffae87c74ce93706ef7d9bcacee7eaa335a836562b. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3818c9c-fe7a-4cf8-bd14-253babb1fbaa.json and https://artists.proofprofile.net/proofs/artist/e3818c9c-fe7a-4cf8-bd14-253babb1fbaa.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 0xdc75328f9fb802db7e0dfff94d58320fe9e6a5e7a712f5b0bb709ac8ca0e5422. 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/TCACK1502413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3b2fd791e6a197c50fce2b7723d52f95ae61472cfb8e46938647a9584b9d8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACK1502416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7525a55caa7021d801cb71bbe13bce90c2cb4a9afd8dfb7480acecfd467484d. 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/TCACK1502420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7086ce0f3ea1d5dba6a7238e400c57aea60bb61df416e90db1125743320651. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:28Z), 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/TCACK1502418.
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 0x810b821dcfb62404ecd1c5992fd8eed123df5a620cb56c9e638440ec260417ce. 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/TCACK1502411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dcae2986dcea9e9906ccaae7421587f178ca07447dba505c2d5aadaedd97ba. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/TCACK1502414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16205c5680dc65ed12b91011cc9c74ab9722d951f2c4d94c664380c31b8839c1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCACK1502415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebde090e22b7ca72988d5db2599c337cf0a7ac50c9b2f2f358e459c122b533a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCACK1502417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3370ec7e1f920f286824cb409a60e43941764f7dad0ce9bf765207fdd74249d0. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TCACK1502419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd1370dd08de5a97c38d99d1137491a01fe2b59e54da408a765cd39e89a1e62. 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/TCACK1502421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a277f31d4a89634eba4a6d5388a80b340fe59fd2fff68c9d0ccfe47973622f2. 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/TCACC1479834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02f83085cdf075fb1bdffe6ebf5c0b82298a6f2c6a8b4c06d4d9defcbe6c87. 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/TCACC1479844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75483fb20c8e3e5fb9d0ee3339edbb788e3ec7dcea18ca55ef48b9e9debbf2af. 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/TCACC1479850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f09b3c22766a363e429b9e1e320e88f8d229090b68d2990c64c6653b60069b1. 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/TCACC1479851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb6ee4227bf60509b63db9b00fda8f3e9dc7294a6266f553b0b8d1452408ce. 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/TCACC1479852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd69fad4a95cdd0ff5bc84e6a11a8ff8e80055ae380be7241ae56f9eaa4a8b6. 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/TCACC1479829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd323ea3f7400af6fad21ac2817a9c937746bb3383d4fa12f8cf95a224222d46b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCACC1479839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623f6635c349463ac13e69f9a63a2da2b3363c13eb7cd703b43e8fe24ee595ed. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCACC1479841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c25b866efe36e726b016b8fc0d322426804c2df926d2750faddb2d59010189. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCACC1479847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93b2885f9a248a14859cf2447d620bf4840df4e12eae85afc8e9f1bbcadef4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TCACC1479848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe081277cc3dc446bbec9415d4d0f2b86d0f2ecc2934064531e1afe79942347f8. 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/TCAFQ2179170.