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 0xe1caf0a77083cf73c95591335812d66f6e499bb67c13386a2970a53d95aed4f6. 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/ac7564c3-86e0-4b15-836c-82fcccbd2777.json and https://artists.proofprofile.net/proofs/artist/ac7564c3-86e0-4b15-836c-82fcccbd2777.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 0xb20e3f9c54a6cf80bc40fcb0cca6feb2c08c9578a4bed0ae7c6711d330e822d6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX452110829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf97db81807c619e41d932c03744b15e4c9bf55c992305767dce053ac93ec0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR2X42225329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962f11bc62786af4a5393786dbc42b6ea1d2a4b46d81aa9083bc784736eec611. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SMRUS0074775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66f534a76dd5b91bf0a97a18d37f4f3bc1fd6d3b08754a485284d2cf427978. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/RUA1D2364822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1f931f1a2ddad5217578aa3b97f56f93b8bbbfb3396f5c58cf51b2f24063a2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SMRUS0074933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298bd83a46569f79aada21b63a731dcb9566352b90249f7e9195bf51cd6260c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:53:19Z), 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/RUA1D2364824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702dfade24f8ab55831f80c717ec6cb12dcf09a4b247f72248d5e0ada604cf9f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/RUA1D2383695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944ddee9e85440213e8c38d755037ecafa901132d06df4c2af0346ad78a2095. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SMRUS0075104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9b07722fca6efee9fd949a2b7c033df8b961f9205da6ac5853438479cc076c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/RUA1D2383704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0382ab5cca332d05cb122d2aa7bd3fd764c41985fb1640532e967f5db8c493. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/RUAEJ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67985c7ad968d70ab87b542d51b23dfc7637c8441bd9e39fc8ddcce41e3103f7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUAEJ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1af3c209e80237764496b9cfd342d852887b005a80acc20e3c762749c917eb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZL5N2440661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bee602ac26bb5978789819ed36db4aac069f23ab287dc15463e16e7d12b286. 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/RUAGT2486155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cbd5d0cf9d3e97272233a05db403f219cb87a1cb1ece6103ab1c6cc99238d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:09:38Z), 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/RUAH62417861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20270619cebdf8603154650a1f08124fe79512ecfc10cf086703e390802e731e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:25Z), 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/RUA1D2508948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8555ec94ad5296f84e861dd0fba86589b463af35b0c223140c5e7ec2129cf89a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2508950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cbd5d0cf9d3e97272233a05db403f219cb87a1cb1ece6103ab1c6cc99238d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:31Z), 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/RUAH62417861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0656f0cfae1937dfd84a93a2aa9d9faf9539b45c9c8e0db008e08538500b670. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2508953.