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 0x88b1fb3d548c2868ed4db3e85b2a774a03e85621efdf6bb8bf5253033a102d1d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d79c605-0999-48ca-87dd-8902f2673195.json and https://artists.proofprofile.net/proofs/artist/7d79c605-0999-48ca-87dd-8902f2673195.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 0xa6e966bffb8ec71e92fe552d0cf1d441b182d96757f654e7627268ebf578e895. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USL4Q1878968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67608600dae736ddfed5416440dde6b10d96b84b391796c95036ed2bf6beb27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1878969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3bf78746a3dc412ae927e404ee021e11d420aff3c377d170c8f983b75b2f4a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4Q1878971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c5a58edf20723defa6f594fe553bd7b3a52799482d51f1e52960e005027b20. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1878975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfff3c5ba98e9291edf7f64e3d5d2b4978d354212d204c9e88207c50831405b. 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/USL4Q1878976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64470b7740e8ad0a13bf8f2538f1dbd661245766cca4378f109fa5d6ede133fc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4Q1878979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e52a2e2069a2d878bc2f5176b4bb7940e8d8a8c0e6871738fe28b41db0d4cd8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1866944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64392af6eba2f65c28f37c8eba2f75120ff76fcfc2181e65505b3a03c370f126. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USL4Q1866947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45233c694f7d21c4dde5235e613a3365bcefb26d1e91bf97fe2093404211b9e0. 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/USL4Q1866948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9faef0bb5a007e1427090b5b12b97ad55fda08673b941d852053dbfe5a7fcf0. 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/USL4Q1866949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e551164d2d1d6adbf2f72bb193dc9c145078dde51e12cb554b0e7c5956122a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4Q1866953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88a961e44f551aff48efcf2dbae82dc6fa8adb378a7d00baeafcbd676a5fbc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMAAK2381549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203778e5e166f275c5f8f3e89d5238a21b4140bdfaff80946fd7bc771345d50. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMAAK2381550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7234b2e41002cb52c770620818a45e22f2a12ffc6ff5816d6223f7b14188b01e. 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/QMAAK2381553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52affa321db5f438cbde2dd411131f759772aac03ae0adab3e42a695e6911d33. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMAAK2381554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1920cf063a36228e26714cfcbbeeb48011e35e71c9b1b871c8e31f8f099f92a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMAAK2381555.