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 0xbd2fba233d5c2e780387bd6182835bf12686059cee75f1064493a22063b8af96. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8d1703f-bdb9-428b-b002-99d61a03a31d.json and https://artists.proofprofile.net/proofs/artist/d8d1703f-bdb9-428b-b002-99d61a03a31d.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 0xfc48889b22503beccadd1526317fbbca5b99adf48e7ef9df5535a8d2db7ac11d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:54:34Z), 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/QZNJV2173106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bedbc0493ce7ce893e27e0200a924f10a3e7b5ff40ccd22ec7123e55ea72e5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJV2173107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8274c033858573478e747b031efe165ab0d600d833fec9fda1a1a51dfac0d5. 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/QZNJV2173108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8009bc874d0d5fffd22e5976a0693efda07502f1f05ff02c4fbfb5dd87b5a4e9. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZNJV2173111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8d497cf0f7006b8f452f4016db87218a5b8f48b682fbc0c3577123f1f2a44c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTPX2491437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8479a99b2b68ae6be480d5827d6259481dfd05f7373ee85018f4dbcefddd621b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:25:15Z), 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/QZTPX2491442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98857c9c385ad6dea0bc0006b05dd6696f34f97d50050b1e5b5103107bcb68fd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMZ92158744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581e1b7e396ccddbe4764fb822b55aae0e759442c8af54c982777bfeac4bd4c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92158746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2127b5262ef8c08a74ebb7f94ceed582a6a3e721f2ac87b73f5df9f87111bef5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMZ92158747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c120bffce2ecdceab78fab9e9ec00f11e0a7e4e9ec0c07977f2c3d83caf58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMZ92158749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39a6da4694545467724877d265cb81b3dbe4a875ce77ff9596e8c0bafa9f09. 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/QZMZ92165938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a151f6fc2d8792b87f9acea5dd71e31f1956b0cc42352572e5f2d29aa6936. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMZ92165947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f0c8add9dadc9b3e6d5762687c9ad458ec8095714a81bd0342d4e67203926d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:07Z), 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/QZHZ32205343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bbc4a3c883b79cf92f700a2f08579536fff1a29a2f84273b8094a38e855f36. 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/QZHZ32205345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd34bf57ecb079b6b9499d0ddcf8ad7dd76ae79028b75f58140f326f2432fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ32205350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd5222d2e3e5cb2025bbb9c3a88c8d6d319db89cc450b9de16e30a7cad369a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLS2453073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593b6da72d02c112ae9d19da4de7958a01103cc80ae5f666ffba043ab484ebc. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZGLS2453077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9cd98b8d757b8fb7fddb5646302a9bb4f25358a6a43bfdd88cb3416f28682. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92166161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9122081c5fe4ab5026848ff4ff624ef4c0b02ff6b87d4a36300b6e6a8c4c0bf4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92166165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8164088cfa71897e5de8dae5b42f02892bbf3a5f33b8590e11c51ae0fcbf1. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:39:44Z), 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/QZNJV2166573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98282a4be9ccba55ae2d6eeb3fead6bae95545927c7c3d04ddd0d8cc66342799. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJV2140646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0032af9db5d1605994f64208d35130179099684c3f11f75ad225ad532311c1d2. 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/QZNJV2140647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29121044ac5667563cd82f6cfd15340a52548ae81e934b3f7c86d10ac1fd357. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJV2140848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2615057e564808cffd02a042166d7103d6890e8abc685fd8d120fef282cc3d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:41:52Z), 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/QZNJY2023282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5129aa9cecf2306630317d78718495a1b5d860274541abfb0e191403dcea459. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:09Z), 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/QZNJY2023283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec92bb4b7857aac5f34a182e0bf938a379740b1dcd287d65edf6350aa2caf2b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:11Z), 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/QZNJY2023284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deedb3db56eb24c0c13b512721c19d5c4c0dcd1694ac249cf4c92ff86607d06. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:49Z), 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/QZNJY2305467.