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 0x0bf643e841256ef1f9c413e998595703558158f7ae4bdb3f0883b8873882bd6d. 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/76016439-e086-4c1d-9390-e606b8838b5a.json and https://artists.proofprofile.net/proofs/artist/76016439-e086-4c1d-9390-e606b8838b5a.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 0x4f76d93b5f9a9f1c49a2fe040c2c2a95d26e9f9fb17330165aa9263f3f920298. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBLFP2525962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70971b2b6ca439923fa91ac5382ead2bcebf4a60ca7646f7facf6053e56eae25. 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/GBLFP2525963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da768af092916ed320ded07ca5a7806c7d915e1b49f0bbe843a741d965d823. 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/GBLFP2525964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d020fe8b998e2dabd3d478fef59859705339205f19f3a7d93f37a9e0bf49ec8. 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/GBLFP2525965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c07e72ce7f599c896f8376966cd5197c063930fc6fdb641a464c4a937391196. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBLFP2525966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea722ad5daa11bcf2f14bb285e0b52a62a080332945260c9ea51877c9543de. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2525967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1464b3f3c5040c3821a55f4a03d9fdf562ccd15c8ecee76cc1ba662bf87ced5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2525968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937bc7e871b082c56c94cfd04d351643e281fbb21012c1196ef667bbb542ed67. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2525969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da1c8ea67cd5437838486b67ff08ecc467c9a9d7f0cadf07bb0f4471d0c2682. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBLFP2525970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8191f965ccb29aa21fe749042ea2c06d9ac1b5d5409fb957b79c2a5a2c733cda. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBLFP2525971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3b91e37db59538f5abb4597878b137ceec055f4ff9d0ff10599641f076e70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2525972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735e87eb25e644c4f97afc429616aea76739a95e144204d41ebb4f1f312eeb78. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2525973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63bd6d5240b082ac5512c583e129090cf32d63139109af8edd0871ee2f22930. 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/GBLFP2525974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f4685dcf684f3dadc137f3e5cad1afd427a715b2590972246744359f9e949. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2525975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21de98e0762d977366401c5b020c202ce716c214e9e93596b3f3b3ee004caef0. 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/GBLFP2525976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614b50fee02ac7974e5620360cd34ac98d839fd90cea7017529db29da4648bc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLFP2525977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f91a1348fbbb16ab7732e7dee5684b6a1c4964b3209ee16274bfbf4aeb686. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLFP2525978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e507917f221185cca74c01c118b0390844a9b71c2c4597f1dc42957d21f6c4a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBLFP2525979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d446cff605d004ce735be3a74b90acd8873e7d5c851a3f3f525446235b65a88. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2525980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80076e6e425c1b187809035e0a8fa65f3630c2f959f55023ae0030ab43c84abe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBLFP2525981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2fa69a8b48f73aba423d70b6e33885e431114cbd2fad749a52a74721d048c3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2525982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203a59d21ea789d92a9cfcad6a96fdf83995d11bc54a243e59653c285dba9d6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2525983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00eead7577a3d2426c55ef1c14df2f8f3c8a81a0474dcce1dc3c5686d245f7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2525984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a2672252756ccc18193fd7d3a3b1ae64ae0ccaa3fce3844951fed060415411. 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/GBLFP2525985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb91951b603372c5bfb8841b2303b16d768b55136f80a52020bf4cf9623bfec. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBLFP2525986.