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 0xe6bd3500c5c06a0f92780fda3b2dc8ece5dd34aa4b172e6c60ea9f9d9c0be06d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a91f166-1674-4dc8-8017-051749ab4da3.json and https://artists.proofprofile.net/proofs/artist/8a91f166-1674-4dc8-8017-051749ab4da3.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 0x04475b36872bdd77c5d75680e6c6a9cb150319d5069b37e2cb8888b3fbff1293. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GBSMU1724840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87555c57d5915056a27dae10f23792791de2d180ec504407ffb70385c0f2a1b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT7ED1700657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a45ef2d9cd4d6cc71ce914b32a2dfea0152bdd3272eb4821790a4b66f1d9198. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PT7ED1700661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d61b6664a4aa5952e1fc86ea53bc4a28e9eb09edd0e034e6d35b8b2a71a06. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PT7ED1700662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5997b3b32aacb323cc242e1fd7659ce3d5c878d29ee442e2ebf1a93be9ac5b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PT7GV1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb410283ee343b47149ccde98dae6b206c8f7a230b57161800130cf511cdfdeeb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PT7GV1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b38b3c05e3230151ceb0d461447063cd65aff0f3b475e8f39c52f743a7c2e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PT7GV1800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ac2eb5928dfaae1080a2090ef5bf80cd30ec98f2c7c2c9d0408772f51cdcc6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PT7GV1800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615e78dd544fb53e104e02ffd10da17aca1614776ad7a6159408e4d9ddbea08. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT7GV1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b25b80bb1edc50483c64f9be4b98fc5dc0bd9b5c91360587a3fb0d2eaec332. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/PT7GV1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76453b51ede82cd0c68c01c1fbc29d047fcba1dbf1f02dafbf9d24c45dc5397. 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/PT7GV1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666da05bd57c8a2cb54a195ac893cb07cccf1597354037e4c580627a70c9294. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:09:34Z), 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/PT7GV1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76453b51ede82cd0c68c01c1fbc29d047fcba1dbf1f02dafbf9d24c45dc5397. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PT7GV1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfd631bb2ac28069a3ff404890df2f8726bb1da94160faba0f875bc13b1cf4f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT7GV1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd4c4c4ac1ba46a1072e380f6ea02b8bac5ea98386bef0d644b007a7cb17ed. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PT7GV1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18984a8870691dd8907e1ad8821b91852922915122116e13c9e4387f8150f41. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PT7GV2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2dbea3470626a0d58d4acbcbebbf1ad235aee952795bfcd11852fbea135fb4. 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/PT0HJ1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c10c9a568ebf6a590d25164a74463789a4c4749147a71760d788a97f71fdeab. 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/QZ5FN1784508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239c044b5c4bdaea1f538a033152f2da83f1ca207af06d58e739b14fef4a4331. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PT0HJ1800029.
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