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 0xc1d8b173463108672f097e40f4086c8e4701d600db71610afdc6979cf55ec541. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb24f0d7-9036-49cb-b04a-0e82b05992e4.json and https://artists.proofprofile.net/proofs/artist/eb24f0d7-9036-49cb-b04a-0e82b05992e4.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 0x2d1ae07d985765866108f7b69c6e6a70a604f274c1c54af2787f546529dda9c2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ARNWH2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74686286568294b90a19764d1a706709639c8b1c5b7ba5f4c335bed38585cb3f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARNWH2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038fd3a5011ca00c1b17cc8c34baf73f68cf6850e70e29e98864bc7c518cece. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARNWH2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8259a28b4ed47aeb20bb478b86cb85165c1ee12b0eff7e5464b1c58be6ba5fd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ARNWH2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e65dad727c4604563492eada0b80995c03e9970ece1c4a3d81e7216a815e9. 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/ARR6V2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ba2c8b48d0aec9605fa5c423d5e9c9f52f0cb9228e538e78a4c6de7cc802b6. 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/ARR6V2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ab743c77804f33de4d75cd723f85850afabe1f42a7041748b43846b67102e0. 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/ARR6V2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f164a3d30e2413b4081f990db4ab427495b32b8c24bcbb8d79995f555eeafe3. 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/ARR6V2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee938e5695c23656214bb75ceab26ac466674c5bc14a98a988bc0e1e732d4f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:39Z), 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/ARR6V2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e187df47d2421f17fdb9dbcda8db771b1bd527ce94b5bf9fb7b0040b6297767. 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/ARR6V2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ab743c77804f33de4d75cd723f85850afabe1f42a7041748b43846b67102e0. 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/ARR6V2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2fee6694e27fb003df8497cd5a5e2c002cb8856083ced5c0f2dab4e5060b23. 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/ARR6V2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765a30cea05a4917b2b5dcab272c520afb1d1e86eab94a3e493b2ee177cac26d. 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/ARR6V2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdb8c2f58e4a6fe4f0110c18e76f1e8000055e3f2388a19a3695eb84bd026ad. 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/ARR6V2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd420d3b40d2655716dc2552ed35c548480e19a97e9fca8d646d8deb8ee6446ba. 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/ARR6V2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343afa93a698c72bf282c9085d8961ca9c6c109371384a533525b66a6fdec18. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARR6V2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b107863463b5911abc9bb7fc6e9e9d57766adc007750483dff101473569b5f. 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/ARR6V2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421e732fb9e9678333b3f2892c2ffb39f842a07eae19b23f77f16b33ae0e800c. 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/ARR6V2300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e2f7e3b1de4f1c82d2d38db8bdf8219f868ee50e8cb916d42978ffbd49a6d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARR6V2300120.
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 0x25d8f0488b1bf82e7ef961cb9783670da0ea8157b91fec88a723dec7f369882d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARR6V2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663de0af48483ba9e161889a8df055fbb1c113ad011f733e9c8fda8b6f1bd4bb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARR6V2300125.