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 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 0x58d5e8b116b64fbaa0908e204cb9313d1b3742aa2afa8a0f344ba709577bd46a. 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/812eea6e-1d9c-4723-8134-8d0c7cad7c0c.json and https://artists.proofprofile.net/proofs/artist/812eea6e-1d9c-4723-8134-8d0c7cad7c0c.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 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 0x6a720dba86faafe918675b339128a1119e9e3a285c65e64a657160533148f085. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IELOI1962315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619aea060b460cae8c7b2255fbf515fd79eef16df349bbc49959bc63bb8f43a9. 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/IELOI1962317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c5021f31e008d6acc7bb03acee79792839b6d3567780312994862beb21a0a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI1963519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b99bc89ddb1e6032ad47cb6b306458c7798595e46150a39d14e012cf0a60b0. 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/IELOI1963862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384414a1877653ee27cd4f34725e85def841e7bbbd2a575b9030979b555874e9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI1963804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ecd39daae70e25fed60987363d8a88ef2404c0eca135748977b34284fab8d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI1963863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02066ea16461b280b814303665eed9e77590af71a9d53d6726a86b7b7d83e174. 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/IELOI1963705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877a3e544ed27ae66c41b438d47ec2b45da271db42c5f6801b4947bd7d1b77ba. 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/IELOI1963802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0f07c3dff3b98a5b24cda66ab173dad5c6bb98e6dc233224e79011991fa4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI1963805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e03bc164b562687df9cea2c0e3a108925ab5ce33143c2c48f9a246a5f392b83. 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/IELOI1963864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be7e7f3d759a864610fd3240a1a3a6d9351b3e55f8afd6176c01b3e4d44cd9. 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/USL4Q2408183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cef46778eeb402ef563154492fb7e3c7ec86de47aa8190e3e756204983efa0. 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/TCAHE2349378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba03c297f8bc717554baf4af7e916c3bebff4c2e968fb281be1637f9146a77. 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/TCAHE2349389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa653eeebb5500806d1ede16e425f68e00e29d8c9b1754fe914500cbd953cde6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGX2353655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763bf6f578bd612dce805de98286920092acf0906b2a0e6f7dc2bcaa97c5c5b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI2286105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73564f2bf13ed51fadfa8c5358117753519c039ab5f58147de63bb6f1e239953. 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/USL4Q2059116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209559e81dc0b5da99c89bc6d3ed50c028938b9fe13a7650eacf02a68e9623a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2086722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361543ddf19cdc2caad7e0a526b909ebf486589957921a3c0ea59ac53ba7b519. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM81956005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485270b5cef3dee402572530c1eeca029c2baaf6c139f1ab626c0d9ccd484a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ1957069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d8cc0818a18dd917f86c7450350b7893e402fc90c10de8a463d96b03a4e49f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ1957070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de4a7895ab80252b669fd5a2c221697b945710ac2c8ffa5235abf645aaf0a1. 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/USCGJ1957071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e23cef1fe83c75486c571d46e38f681dd48e2acb9ce5a8e6ce51d341940f83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ1957072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d4bf8e5abe4985153c968ac2950ee60e2db4fff800c514354e12e3c14fbdb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ1957073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be3937849ecacaea82faa174f674c48779ce37e22e7ee8030fe7a16f785e93. 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/USL4R2458973.