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 0x7b73016d1755c97c25d94660318d4d8bb9c0cc202df6511ebaa48ac1386446a7. 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/176503f2-a0a7-42e3-84c5-b20b94a182ff.json and https://artists.proofprofile.net/proofs/artist/176503f2-a0a7-42e3-84c5-b20b94a182ff.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 0x3ce3fc154dca4bd3e983a045f900f509199a6bf84df7d099dc3ef96c1c25f15f. 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/BCM9B2500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22ed23ade1aca95bbe96dc562b2cdebabbf0ae476f47f996987d2c0cc67e694. 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/BCM9B2402252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1246afd16f0b4d246f9a3c8104549a49b7b4b77afad13a9e806cbe7140a3af9. 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/BCM9B2402188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f462a9b422fadfc4b880bd57ef063690aa329e18c22e74a79dedbc5e8e45b0a. 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/BCM9B2402113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0566ed9a113179c9eb315dbde4865ed2ac5b1cee1a12b65cc4d62d748c7d2. 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/BCM9B2401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b6d2225b14efaabd20c6f1fcc611568755b0675798f437199555d24489a3e1. 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/BCM9B2402129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182470b90ed7601f969e663e23d9746ea0ae61d2ed7a1f0370b346cf59bcea5. 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/BCM9B2500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0e59fd6a4556fa77b401444d09ea39ce5e83e9ffb702b53920e584d2452f3. 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/BCM9B2500471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011ee21b97ede0c8efa4e752bda5bd8e2d8f4be219367792920463ac1407abf. 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/BCM9B2500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0d58fb15ffb9403979ec40701e48eceb9de3be5254d7bb502757b38a2de777. 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/BCM9B2500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7952daf1e539ad2e440eeea3e6f52b58723e41494e63d8990dea76ac671ed1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCM9B2500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db30f1756160cee475fb2b8b10aeb452f7ceb71e6e5c5f803ff77f4312c8e97. 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/BCM9B2500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4950ad8555aa5c3a0a6ed0b24b383bf30ab4f7d270faf15d2ab3e9e5936b94. 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/BCM9B2500338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76cfb3910d558908d20ab908a6950764a8236cae510b14c1b719f30d6a0f5f6. 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/BCM9B2500322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135d261ba3b8f9ca0d19bb719d68f8dd76ff7e50b904b4b69ea58e790b9c72b8. 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/BCM9B2500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea31ea0b79f3b6402a198bbb02335975d3104548dc17bfa836607492cd72b3. 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/BCM9B2500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e772341f39d1ff062a5248fbc2b47efcc616bb9201058545730c8ffd73287. 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/BCM9B2402314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f7ebdcc3d706d6be6b8268f93da73389d8fb2f37b0dac803f8e57185bd7a88. 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/BCM9B2402254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe026cb5aef37086a4654513fb292c4bb5cfc923a470e3d7e37f2b3f96b4d215b. 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/BCM9B2401881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a411f2000f8fa597c9ad7933277c8df18cc9fffb86381ab1363b72f5bced0e. 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/BCM9B2401879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0695913c1a079f1405a782cdf7c4e1fd373c2756ae47d0d8ff7e2232c12fcfb9. 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/BCM9B2401872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca19151bcdb531d8769f2980b5a9a0266f0adf9ca8d2821259f6e8c43652316. 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/BCM9B2500897.