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 0x4148e26c173b280465a2cbe8feb9bc0fd6baa29e800214623dd96361eabdf28b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55fa82b5-a191-4e15-bbaf-a5e52e5e8ad2.json and https://artists.proofprofile.net/proofs/artist/55fa82b5-a191-4e15-bbaf-a5e52e5e8ad2.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 0x2557fd99cb48a47d31098194ce42213a0a81fda00dee2afa3a418e879200f1a1. 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/CACWV2575996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71973c8bc6747652d47ca95220b61b920d8a718b0b3002b2fb3e38da4abb990c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:26:35Z), 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/CACWV2575946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2e2a8397a0c992da56e7cf9b4f3687048b6bdcc904d965b136222ee26ded93. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:18:47Z), 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/CACWV2543086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3982dea7aaae5b74da7434c959bb57a4f682523ee87166cea9b1c472f33e420. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:54Z), 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/CACWV2543018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1acc9782902437d49f1cb6f021d2c4556528b61e13f0ca011a8dae2f03b3cd5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CACWV2543014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1455714b7f2d0db8a145b30b89e65238458dca7225ff0a37a7f0fdec9425ce7. 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/CACWV2575921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec8cf095c890ac0195f3606fccee4b749a34f41b02ff7866fac11d03c0c3fe2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:47Z), 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/CACWV2575995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252dd19e69813bade0eb30f728e022f8289a1122bb5840208c5835c6d006173. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:33Z), 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/CACWV2575973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d844b3d469f7d187404bbfb366952d9c1e4e4c0f1326ab4deca2fe45dd4800. 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/CACWV2543071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737eff11c0c8784550e1188ca168b8fd1dff633db8673d0aa2d3b4243204ef1. 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/CACWV2543098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cc5f8a082279747d15e6f040b5067403f174e8981fc742452a46af93a0351a. 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/CACWV2542952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb39323d3218d3bf85a1ce924957351917425b9738ce09a0f6daf129bf057a7. 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/CACWV2542970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57fcabe8ab692ad9f8cbe309c12cecaa592868d7ba247528dbfe38012fe5d58. 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/CACWV2575920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a77c7d1a528614d7ac87bbc5fe66a305d67df51cb54cc97e9f049446c1cf6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CACWV2575890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac99ea2a5daa1beef7c88586cc6acd536d457bb00a2ec4fa106669cbd293085. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:31Z), 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/CACWV2542968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428ad14fb027a6f52e8a5041ecc6b87be7885ddf199767ef8cb9f9196e449cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CACWV2575947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb976498d7f8d84ed98c8b4e98592431e5152fef37da6a3dacd4f829d4a8c4bb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CACWV2542950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566b576deb0e145cc2b6eed5bdeaaeb9f860014a11116bd0e5c21c164715272. 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/CACWV2576040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7cac03462ae0b3e1cb3eddee166f4e1ea3d3bcfa3f11c911a8ce2b5bb7d3dd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:45:38Z), 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/CACWV2576379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ea6081082e4548af30c3c0d95b1a792d08626d20b3798b1b77e33b091a07e3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:47Z), 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/CACWV2576378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d88a1b2e8f1db09090188a20c45ba3aaac00143bcb872d3d26cc5bc0ed63fc8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CACWV2576382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541d6e4f8cedecb9397004ca777f5ec4f90981b40128139842d3cbcc7be89bf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CACWV2576381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad47237079c5717c1bc26dbcbf56d7a7aaec2a30200b359bb80f34a5b530d3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CACWV2576380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66c74f9a8608c463b314b8183acad0fb6e5ca89609a7880b5a8b1c3fa6fbd56. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CACWV2542931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbfb40b5ce6322c3dece0f5a90d7b95e98b60f0e8afc2fe3076711a370327da. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:34:29Z), 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/CACWV2547670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41392f3442e0fa041dd65d9e898d0504a82fa0da6769ff478c1a7951e6e5b501. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CACWV2547667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff3ec86398f2b5d26c23a772b8cefb64ccc857e7df3bb674aa3e096f4a3444. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:04Z), 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/CACWV2547666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b4acbcb0bce6227edc026db627c983af5518735a119b38a4b5dbb0b408049. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:21Z), 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/CACWV2547668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df5e87991b0e8bf68e3141a539bb35fb950f90994cb2776b444fba8de644f2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:00Z), 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/CACWV2547669.