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 0x45323af1fbeb7183e13d531531063769e757b93266ea0e9e8f3a7c72ce015778. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57f291fb-79f8-4869-9cae-7ce0cb6dbd6d.json and https://artists.proofprofile.net/proofs/artist/57f291fb-79f8-4869-9cae-7ce0cb6dbd6d.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 0xd31df6b0c79c94e94f49e0c301ac4d9adf273cc8989dc7fe4c0adf664d76f920. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEY472374269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4700b45cb9d26a176d11a1387eb4a92d90909e5ef0793978a7d3a702de340b3. 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/DEY472374250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110b1b076cfc8801327c5168d60f918dad0ad237ae29ad126361af35cb0bc2cd. 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/ITZN72300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17116666fb7e448782a6a9bb7a070875e677c3c8583fef7e16d993ef8580bdae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITZN72300109.
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 0xce8e9e6f2370ff5a69a847cdd88ee3e2cd0adb6489c35e8f77b77d3f37260c57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK41081537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7e358d307b0f3173ec35d7cc5ad5afd974bba82c0947dd91f0468c4ac6d5b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK41081539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355c88176f8c22741026b3ad38830f2ecf717d125df919121cbc5defeaedb1a7. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/NLCK41081538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c010030dff663064da7a57c5d3c4f3c617b8d4da6e8ec220d6d147c6b09a7c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2084334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c795b4c4bbc981e3d1248b67d1ffe47b14ea957009f2a3a80b5ea7ea1552df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2084335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08dc357ca387b585f02e2eafd8c76dfa97908a9682481cdb5b73e66152aba2. 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/DECY51902677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd823c54f3577a03cd14f1832e13b8fe2805ba56aff78e444f219571705d77d. 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/ITH641936354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c44c572215e0182e26c0fb05dccd93c17bf17c40cda3f68ad31a76d4bbe3b8. 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/ITH641936358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6003003747e92ea89bb0e4132341871645759c5ee45fa69bbcfc01ba9d7b54e. 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/ITH641936360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e3af56928969e95e1596d9ae8752b899755387249e5381eb4c176bd84d2d67. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/ITH641936361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46695316164f1499c886e35cef31133ed30895a0ba712a378a726650453d7536. 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/DEY472374328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe8ac241bb83d0a10e1788731dcf4c6a2bb6862aafc5144ba21657b43d3a92. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/ITZN72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ce8682b9cb6afe139955c67e643ef6c7933aaf38e0a32113e3a5f85dfe0171. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU2235733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359b40011196726aaaedb6aaf3099af1bd2157b6ba06aa088098411141d10ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUR32198014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d7b2215d159f1be456b426c0d9abe1e67a11fe12c8487ffc473e0e40139b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITZN72000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb51e5f3c57131837a041851af9cc02f27505a3b7ae8a19603d61a847baa70. 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/ITZN72000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458a9a2d38a551bc97d27ab46926bd876dbd4000a64e57d9a47bfaa996531b69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITG5T2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7aa82277e05c7fbf995bf79a3f77131efd72500403750212b182d57083c9e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITG5T2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc094df01d7f16ba35b56eaf827b37b5f34503626c28047e34140d5ef0c0a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2167899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3e75f7c822560b958f7c26d7c8bcdfcbf38d11675127070eca5727151b2b2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU1908125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d04facd6bd2376f77bc4bcf98d7ebf1ea06d6a948395767c2d29bdd2228c3c. 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/ITZN72110114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3251c5f85f528cc3b9449d76382e936b8509b54433839b4008160f156b956fe5. 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/ITZN72110115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1904b3882d014e5578d4a2e750b32427616074ea182fdff0cbbb3e71ec3123cf. 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/ITZN72110116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5aedea16febd75f5e50e4ab32aa4951a13005259113c7d929b6096b87cd491. 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/ITZN72110124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00465400c3f19ff0b0e9b8f6b803d8142b4b469691ca55c72d1a6b192161d06. 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/CA5KR2432808.