thumb|upright=1.35|Political cartoon parodying James G. Blaine with his wealthy donors feasting at a table at Delmonico's while a poor family begs beneath. Illustrated by Walt McDougall and Valerian G
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 0x6d4c9f45327b822683d542407dd2a51e06b627b5a6a8ae313d52682d7cdcbda4. 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/88761a72-2ec0-4fab-ab01-0eb0ad754ff3.json and https://artists.proofprofile.net/proofs/artist/88761a72-2ec0-4fab-ab01-0eb0ad754ff3.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 0x25f0d6c052d252d695a48f59e3bfbdcd0340fc0a098a0eee7eb56d836542dfdd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR19600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a86ed5ee4d2840d2bee1641c04d5c9892397f2524b4dcf7c5e055f83a5e958. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYKR19600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca9acb31fe4be4c4c33642e36921af741443878f4374f30ccc15d43fdcfd500. 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/MYKR19600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bda1edebe402adecc3c6fc5f8c537703699aee969f168dd19ebfac916e289d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYKR19600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192a423816650e57786b614b9b7e2ccf8c444cda4dc9011b97d63de57f58411a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYKR19600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbcf63659156f2bae4ea3595a6b7744c07c997c3be1e13442b6417a81af3a6c. 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/MYKR10900363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b179ba33e20b8ff8f15d21beb3a00afebdd3d58200377a5e78407a0d430a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYKR19800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f0d6c052d252d695a48f59e3bfbdcd0340fc0a098a0eee7eb56d836542dfdd. 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/MYKR19600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa504684d565cba4a10124cc2cb15235d21b9b99d8deb7e20cc54426ed342f22e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYKR10900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ad815516870e9f4d04686a781565430232e5cf78ef70b5875a7bdec783a472. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYKR19600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27459bbee1ffa4fadbf0f47d3c36c53277f4e30e953f22d60bf61db02f8eea1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR10900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c08f94eb715d3eee76cd69fbcd4c7659be83691ebd8dd3c066a952a63b443b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYKR11001155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3147365dd03c9fdfba7a4854b75fee4ab44992ed0a1c8f091d6fb079e868df23. 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/MYKR11001176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6f377abc7581b6feada7f3a35b240b204fc9e2162706fa5684f640dc43d75. 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/MYKR11001182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde98ea9cac00f0ac1aceeef9f97700580cf20a224f2fde656882106fa201aec6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYKR11001164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c904e0f8a1999ee4790e6853df894efc342fb8baedc2a97179acb760ef320d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR11001173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535f38fc306885ee20775ee1e73051809bd94399efc7e08272ed939ced80254. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR19900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c599f369ae7250e9eae37af8a9a7589d96b9613b3296647d0b76121ee44ec57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYKR12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a86ed5ee4d2840d2bee1641c04d5c9892397f2524b4dcf7c5e055f83a5e958. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYKR19600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb34a030a0015e5207e1bc261ae5d8c56e44c5d766cb50882a663b8bcc2731c3. 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/MYKR10200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1980687d42acc2d4560833f6ed5c05f834b82e06ea4fef9a125455f7f5ca4f. 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/MYKR19800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde10e4a80d0629bfa4cd81347a6987adb802afc92e7a4fa7f217bc10dcc258cf. 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/MYKR19800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f339605ed2a0bf1a82ff3310f47afee021820d8ebc6ce1c3aac9cfa0361e879. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR19800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771270139a49f10a56e24c41f6bcaf35c48c97112dc7de784137a242a040636c. 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/MYKR19800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28455d8345af16b57fa4187a1dafb2856ecaff5bf09ba5d87610018d2dec2d1d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYKR19800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d1fe54b04ab8510d33e22c9e5e30d386e6e1928e8a809918cfc1d4fe0e8ac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/MYKR19800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b179ba33e20b8ff8f15d21beb3a00afebdd3d58200377a5e78407a0d430a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYKR19800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66c1269febd6ff1b30b8b1eb7622cdf5c97d58039923712ae86137437e8361. 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/MYKR10900387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838e2803b0ef87d61c163276ecd3d9adba0c637dea37755481634035525d8f9. 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/MYKR10000082.