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 0x071d6b41961ec203a9340c51bccb3fd390f2f164634ec3e46dd2eaf425fd7ac9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9799b33f-f956-4f0c-8a86-dcfaeb0c11f6.json and https://artists.proofprofile.net/proofs/artist/9799b33f-f956-4f0c-8a86-dcfaeb0c11f6.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 0x859062abaadf1ee83eeb4f9c9f375fdb6bb617f23ab8424f1520e5b5e5fae273. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNWX2351658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1a4ffa39231905e0db30a2a151a6fc7062d897e69d5a73d206647cc760ce5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:56:32Z), 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/QZNWX2351659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620b632030b6c218c5b24bac2643f083c3af158e0a67e683ff2946e2ba4cdec. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNWX2351660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e18a3dadda850cd549e6df7e138a4c09a2b42090d4ce639e3af573d135abe7e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWX2351661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93368cf8fd10b827fad02a76b33b0cc32f9c1a5fd3ae0c39522bdad4031338eb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWS2341853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7433996af8b20e0b5bca73fc395147c8e748f386a1f4759c25e4991362de62dc. 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/QZNJY2405899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9503b5bb69914fea572739af6b78bd7da798cfaff4efe64afc118b5b75c1a751. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ792483686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f85e5aca91f26cd6655a3e25d4b1530e3ca82ef235a8aac035e6c07cd96b2c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZW9L2470822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca01ff65f72f3959a52b82bb9a90b0353918ea2eefb682dcae6f317fb7d60b3a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BC6M22425890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a968b041355a651995c10137bc268308842ba9dc90b365da96b1936888b60de. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:04Z), 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/BC6M22425888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697b4e29790ab376148d033db2d2c3904d1f68ba47cb9743e975cf866dc6f323. 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/BRSVB2531215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b77e1aaf246deea0cd2b4af825a810d7def69a705c8b7a37444995ca2c301. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRSVB2531216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b481a5a24db06b632f4b28a378919181a396d9e5cbeced091ad18bd5a755b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:55Z), 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/BRSVB2531217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570a2cedd394c29b33ebe777deb440c31bf89412d9434010a0428cc2cf352321. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:35:14Z), 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/BRSVB2531221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c62ceba5d04feda3f1915eeb0b1114e1d007ad46822c7717754812e573d04c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRSVB2531223.