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 0x85ca0162fcfd49ed19c1ce3cf5ebb3eb7389644075cf78cea48cb5313c381031. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5e31426-64b4-432b-84a1-5570742669e9.json and https://artists.proofprofile.net/proofs/artist/e5e31426-64b4-432b-84a1-5570742669e9.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 0x1e55c3015510def97dc60366a7efeb6bc7fa24566745979be8add830cd8fe44c. 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/GX38U2568002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3df6fab5157be42597061a12b5080e9af32c2cbcb6760760b4949fdaaa96f5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GX38U2527899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18985d297108221fccf150904f284bd987f82cfa35709b42fdf7b83e9375d15. 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/GX38U2536696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02ba02749b292aab53970fba59c9e0531f664a1c80bd800e46f4ede217c24ac. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX38U2518786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b857179731df7b7271ee700b990ab1906d25ee2cb1ddfca13dd668bd40bd59. 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/GX38U2585999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d1c6d00e0850058be84e31715882b9f970527e3f398d5e632cccb6fa23acb6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GX38U2559819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c775a2089505afd2a13a0927072ccc8adc17a619c416f25a0290440278a576e. 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/GX38U2586977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880730891d41edcd26d2f4995a3a09f8b4d6fd01b0602d3f1c632b5347d4236b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GX38U2553984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8472c0997008a88f03d8bd65e3c47c799f64474d6c43f0f80dcbeb8612d4f9fc. 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/GX38U2589060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d39af98b66d2595bb86f0c18c3280bf919e5979d4d65a1156ee35e93c80fb. 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/GX38U2561273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3208fb167fcaba74a26b00390645b7ca10c4f725e4eb876b7f4c953ed87bf786. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX38U2531609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18700324b167f50f6c03602c17dcdaf5ebd1d64c20c7fa2a7609af14751de962. 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/GX38U2594692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c8f9784df7854d790ced502d79573ccff41357ef9faa3eb5fe77bf0e479428. 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/GX38U2521039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a876bc640ac2453c7303c1eb784b8a646126636f2d576090dd891d97eb7b5c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX38U2555620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdd0bdbe34e15967c62c77b8d67dcfc34c8b8d12e3ff42359c4d8fd11683495. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX38U2549256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cee6b05b6dfd379a01e1eb28b763fe60d590702c7fb65b1170784bd9bbcaf9a. 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/GX38U2511396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3525f56042d209824325ef6e1a1622a3c65460784f344d3f7a1b029babea246. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX38U2571719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc187084ed1971bee6b515980c291ce4ce27a0bd6c8aeb77674520793e56a25. 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/GX38U2562054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf985fcd61e6612c8b21612d5418199570c5ac14601f1fea0afbccde6f54151. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX38U2568875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929fe25fa886a49e593de1bd27bda350daa5b93d9e2590fa166084cdff4f917f. 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/GX38U2594407.