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 0xf79e9a13db9e9662e02b696cd03b7d05b56d7704bb2e2b5004c33894dff570d2. 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/ef440873-af54-4e3c-a2bf-73d2b6e24887.json and https://artists.proofprofile.net/proofs/artist/ef440873-af54-4e3c-a2bf-73d2b6e24887.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 0x29d4d060c652969bbb041ce0c113722410458ea5674650b050eb7623d377a7af. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USGH80710672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b874d280619ad4c480cc1911fb23d45ec4485affa4db6f898abc8d1560e7d44. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:58Z), 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/USGH80710673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cd6d2007100db759a53aee290c5ed00654f0bbc62ab563ca309b36dcc3302c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USGH80710674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84d62d8ff92023020860980c764a4b09349881ab93efe208520b835821adbb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USGH80710675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e765d0e3f5af7d97c3ea2d6943cf56db403100224ca9963e2c6eefb3d0d858. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:02Z), 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/USGH80710676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f48148ef42bc1a056fae9d09ca25dbbdec8dfaa868a341f3700a214f616bfff. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USGH80710677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f11c4dc4d1e058713d95298625d48c22cf25a2425819acacefc84b47e9bb0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USGH80710679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc0450e0abd0b276da3fcf0a69ec90d38c060706fa8ee1f6814dc8a3ab90411. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USGH80710680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb9a204ae3d747bec3e969b640c81603dcf66d925144d666ae7bf4792c5258f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USGH80710883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa994b9666502e24f2e5acf606bf4d38d186bdde49abcd4bdbcb0e5ea91639ad0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USGH80710888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345d0c9852ab613876237f1aa078e98e7b4e34cfac6a1bc2915b4b2ddc5c9ca9. 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/USGH80710499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f40f7d20c479f557b8f6ba218fe4aec92b9c1590fa1242ae28f482b7ad40e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USGH80710505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e8962cd4915d291c054a360234cfa9733551fc0ae9e537f2a3a58fbb25fef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USGH80710743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3296c40441bb4787c037250574318e7337d6af89523d47e51d34be79a30ace. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:02:40Z), 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/QMBZ91646582.