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 0xe1e0ad0329d0a6e288d73bc92dba4fe360c219a182a121d58712c47094866a99. 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/054883ac-74cc-41ae-b2ae-174cdb66aea6.json and https://artists.proofprofile.net/proofs/artist/054883ac-74cc-41ae-b2ae-174cdb66aea6.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 0x1d3373749cddfb145330ef05713fd93a9d607d57481a4067f814d61e40e03d6e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9K2458482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515d0a6e56cc1fb4dfbe29155967b073e4c887fc7852df06f73d64bb3181d7c. 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/QZW9K2458259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc2e26ef8f08f1c95e1e121440f4c34b680ab4727d4d96dc7345ee0d76cb13. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:25:31Z), 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/USANG2490732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f16a7824f276f639b13286f657f2b924a3efb09fddd65999a05725671ae1f5. 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/USANG2490733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c9d1124292365b45a9344ffb3101057fa380492731e6510a054ea94b2b909. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USANG2490734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd8160a90fabad8df0ac93a629d0c02d41e1f8d293dca832071998d1fc1b07b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USANG2490737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c8ed20022b556fdeb6aed4f3341825f4ef29bf6f790ac17f403baec733d213. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USANG2490740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fbacad4fe061449ae5617cb5e0a19747bff5a1e48fc5a6be8985bcc6eef284. 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/USANG2490743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfd8489521da75f45fd6a4547597c7ee57cf8753f4729cb16df57758a50ec85. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/BK4DA2462979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528adddbb8b1cb12630b691e046e5df075f0add7f1f3a1ab69982df8c2af51b3. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:21Z), 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/BK4DA2462983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f2c634221af77009b9c52a12a3ffdcbec61070519516b819a720f267d5688. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:06Z), 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/BK4DA2462985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b36a82e6c98c8ec25d03e2fd8a2d2a731b385cb988662e6abdc5ccfa7a130c. 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/BRSVB2513566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d2e075e1274fad526227d48fd19c874479ab5dabf59ae6062b45918a0630ef. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:34:33Z), 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/US3DF2596188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703039741eab4b49004deea3058511026b70e8a9742421768a947460a66c8e7a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3DF2596178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac77d9605b671a431fb36e6d6a12f3cfc893c3840bed9b40dd076beac54a4ea. 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/USANG2522901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f9c86ca1c98a149a794efdf7c41af8ea7bc762060f2511a75d2b7d737882a0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USANG2522903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363a692798d929100ac590bc8d1a94daacad0faa0e4cb3320d0d6401446ea754. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USANG2522914.