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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5de5c6be9c1b63e0665ef3109f8595ff92529ae31f97968c9430513f5194d21. 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/cefc8422-f9b8-4856-aae8-0876593c21a3.json and https://artists.proofprofile.net/proofs/artist/cefc8422-f9b8-4856-aae8-0876593c21a3.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1d2d65d553ec23e2080dccf17c728eae4825edc6ba4e32b3bbe5c4a2e634e8. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USCGJ1280210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83539c48f6a3f294d83ff6a27c2073337f1f9d4221fab3ab5e6b59bc95a23ee. 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/USCGJ1280211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573a3696fead4440adc15aa1fc1995207fe42ff9c409368273042a25bfa0db6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USCGJ1280212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e49a176399933dfd2df5d16f85e7df433fc8d5560f3a51a8881a890f917d886. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGJ1280213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83705c1ea6bd75159d5477288ebd4ebc9d277200ae2524676e11803b52d37316. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USCGJ1280214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490f97dd3b255e0af99db3c55bc86c876fad708e0bd7c2255bf705f5ea729571. 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/USCGJ1280215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68fdb7b70de12747b047760d7ef147761f5a71a346093542960135fc208297a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ1280216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87122e20cdd5c368274e23c304249ccabea34dabe70edb5d9bb591f1be89c9cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4Q2485970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c4adec951dcadbcc978fbce7295987dc603a4d902356590ee594fab8ed5453. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4Q2485972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde301b3f400a1019b297d1d061030040a848f66ac245c82de9421c66a995ddab. 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/USL4Q2485973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ccfe10654feb76c7b1a53449826e79828523bec9cc7a4518fbe645d541a04f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USL4Q2485974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b9754db829742eb92cbbc398ca30f4672ba7eb3bcf09e37876900d8624929e. 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/USL4Q2485975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0a4aa7cb182edea87001d589f41a4c7bda106ce63130d5678e5d4046205d2f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2485976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8fc082ed575273b4b9a9c7ce28995853ce223b9f45272fe8be6036e282a4c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USL4Q2485977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a31066bd7b18594b98f56a2f998fc38f464d7438dfb1c8b13f312a92b2dd1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USL4Q2485978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efac22bdf8050e1230b825808690e37b1ac72cc17e365488ec8415a6e21b12c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4Q2485979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec6b0c06c8e9508dc244b5d924a20edc01edf0e0a33729853e5461384eac39. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USL4Q2485960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac519ccb4c8491b80714dda8da4a42edf1ebb10b347515af0d7953c0f881eb2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM22598608.