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 0x8112405cc52cdbd1dafeb77c44f9524913570faff8c5549176eb8bcfd68eacbe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0a60d09-3541-46b8-b464-a736845070b5.json and https://artists.proofprofile.net/proofs/artist/f0a60d09-3541-46b8-b464-a736845070b5.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 0x4720d02c62d3ac54fe4337f77bf883bf70162ff9ce324b1cba381bcf7171767b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2475877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3851fde408daf731cf97e7e7562f100cea0ec83865793e34494d89a8c08421. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZW9K2306808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe4795c2c48e0c687482a64d5c3af0cd95b8cfc7a3c8c4ae8dbb6b1409f3de. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:28:11Z), 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/QZW9K2306500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe038edef759d04d1df143caa33e0d64f05b762664f64bc45cead303bff29bb62. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZW9K2306501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60714e7d43bc76a43405d90914e633afd3180095b34c25edc42a31b1d1266af3. 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/QZW9L2399044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893bbd51c93e46ef422094a8a5c9b27777161b0651037a0d0f35451011a8268e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:11:15Z), 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/QZW9L2399045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846c135a73d69bb720a664079ca6ff26d6459307c4c5e3eece6c6d1f45065c4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZW9L2399046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f73eea8914024f1ebe9c57ca4b01c15690a2f604ef546704eb9e6d33fe1bf0a. 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/US7VG2497886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94bdc83c7caa58f363cec36d9c4a9f572630c88c71bf65c7e84f04278d2bbd3. 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/QZW9M2368015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbb6a83ecb9d508fac43efdb89427a28cceeef72a4656a42e07caec38dbb5af. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZW9M2368017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7735efe0592dbea1609d2f6f238263ec4b93e66c2d067d78c92935d214d8d8e2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:47Z), 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/QZGLM2475872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fbf65e977a4d47d42fdbcaec37beceb794cd30c4bbff361b6b3668553ea082. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:43:54Z), 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/QZGLM2475278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38242d45ea4437dd88908dbfce508b1789d8397ec055b45d593b096352813ed2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZW9L2475822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e4f27d8ff39030b07539902731390bef6435908562e9396c5d9b8122011815. 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/QZW9L2481231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61f8c6a6f4ab41887af33a36a18214a55cb25f16825307f85f9fe89449c5b87. 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/GBMA22357707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcbe16d9aa39e03031c0b85ff50c7c516cf5213c3ae63427da8a4312e80b917. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/MX2832513265.