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 0x82866196b33c2bb56dfc277fbebe57f4e898d2868923c1c2cf919e95d9ffbcb4. 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/b34774a8-94b2-46df-9fa7-8bb8227c62c8.json and https://artists.proofprofile.net/proofs/artist/b34774a8-94b2-46df-9fa7-8bb8227c62c8.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 0x101dc2d50437e145cc18c11e3ec3d3e7313a25abfba140c26190f398abe6e5f6. 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/IT0EP2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06227862f14034dcd9fd46ff4b5d22d880bde9af91f7e17b66d1c39e5028c265. 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/ITSJE1800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f531496137d36d5ea982082c35e431cf897a62c8ef2636546bd43a7521f22ef. 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/ITSJE1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277a5601791536911c2d6e9461db33ac9384324d478ded2de0f99f00924c088d. 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/ITSJE1800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157875f7f6498d81936ac7dd94e9b8043f1783819888da1f07dd8d3fb63f2f3. 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/ITSJE1800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e465d7bb5f8e137c87b18f1a3f5de493ff3ad4020d2ee42a0a3038fc124c3a. 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/ITSJE1800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58351486f23cbf9d36308739081ba5e55b14db5c703dae5bb385e32936bc15. 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/IT0EP1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f948c00c65f896b516108d9bddf039209e73e2dfff6d8fee5bdb279b2781ab8. 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/IT0EP1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416395e0860ecc1791dee2dbefa4308ae01348e9555c0520fa44731a1271b27. 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/IT0EP1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5825711f9bd2c71a0e816490304de1c54b0cbfbce5286d56cb95b45f6cd89. 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/IT0EP1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74063bf045120e55996af89207cfa4871223dafc8597fdf7c70a2232127081e. 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/IT0EP1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeae84e5e710694a7377533f8019033ed6b6569c8608354278fe4771e6dfc3bc. 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/IT0EP1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ebb2ab08e847ac244657614f88acbd337abcd363dd06d8b6897cae995d916. 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/IT0EP1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28efed722d083f6931357bd9eb0370f8f3d78391204d685b49567875f9952292. 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/IT0EP1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fbccba19963845c374bad68b4d2b7e56befcce8fc50447b185969026c85c13. 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/IT0EP1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035b2b4d6fbe60ae05e570dca2e94b5424713eb426c9f9e9a0328fe81b69a874. 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/IT0EP1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7132495c6560d4748e25bf69d1833cfcba2221cb98df050600c3d10ef3706eff. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IT0EP1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd810fcebb53f9def6b20110bfecc6933136344cfb7e641bc81521dd05bcf9d88. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IT0EP1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b703e6488c72b7f375eb718dc4ef0f61c8aee486bd524e70558863ffa25888. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USA2P1417346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eae78f62dcec20f4bd535c519d09285a1089f1d0e7148e9b9e2517fe7bd579f. 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/USA2P1417347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a2f97ab04b3d72688cc6a0388f58c438b1dded61c898b00e17f8ac0d3a79a. 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/USA2P1417349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a6d7f8895c52c83bcc7ec9386ad633360b2e224fa5a07a86e642a5b8b1d76b. 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/USA2P1417351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca84ec3d7fe42285d459f2f53819ae7d505edda66b3c388a349507fa148209b. 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/USQY51330804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59752918e17b195451035b10f52bf9b0f825d0df26fe7d8c00e0a7323205dc02. 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/USQY51330805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bbba88bff906141b20ec382a773fd914ca77e69da9a22dc4aa8169dad0e1d6. 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/USQY51330807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f8cc09428809f1e1c51cf51ea5a8b3b3f8a3ec852de18ce179d484a4da01af. 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/USQY51330811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7318aaa1426ec8a548bc420fb715a07bfa8943998e9a1977ad78e4110351960f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:46:55Z), 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/USQY51330812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05dc67b17d7ec82c883b63dcb5c8025c22b9ce571e573ae7d6396eb5df885f0. 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/USQY51330813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc378e9c51709f8d13418908085132cf4b839b7cedbb86902cee24611459c80f2. 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/US78S0510303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9eff2069229f4698935e44ff5bb04b94bbda371bc80302e75fbe0ebc429fb. 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/USQY51255553.