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 0x8784086b825ed1c5c1a4b387e287cc71f3c113ec9e3ddfc36fb50558f31da64e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff7703f5-2bf8-47ff-9601-bdebbb37f83d.json and https://artists.proofprofile.net/proofs/artist/ff7703f5-2bf8-47ff-9601-bdebbb37f83d.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 0xd36066df563ef7909dbcf4f12b0c103535571cb65b5f15985b34d0da2e81cd2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6J2339858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6fa7aa5cecc5bdbe597d8290234a186556b02a4c274006d02021197c9ad6ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72213184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc2fabfe2657e7c3acab454990316c47f88da82b872bf51be5f2fbabfee6712. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZH6S1900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32931de90eac7acda01d01eff876b1035d80aebfa0fd75d03c5b29d278a7c052. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZH6S1900605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff74d6be548441e037843b1122fc0ec5c837f14740ab3e9a5329f8bb728d9bf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPX2397765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ead9d4513ec6c6d26f53ba152a9486f5a9eecbc9e5ada12c1985ecff16db0e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES71897260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde56381b1f35caf53cfd2d25239f2d54b077c64b090d63d52d029e5ef7cb6c5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGWX2196177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d3bd85085cae414ee9f17abd9d9a4e004903c25978f1a558c6fdb8e554fd00. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6N2295971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5ebf49d55b7b24836e48167e72c30223f702091c1bbba7e99dda914449d9e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2196419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ead9d4513ec6c6d26f53ba152a9486f5a9eecbc9e5ada12c1985ecff16db0e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES71897260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc617c9ce117fdcfb30e091f02710bc7a045efdeb7a49780aa1478695e4f18a4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCJPK1923996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2749922942bc3629800ca599e16769ba9e105aa6b9789ee242dc997e5d27ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LD2214040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2749922942bc3629800ca599e16769ba9e105aa6b9789ee242dc997e5d27ff. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:21:19Z), 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/GX8LD2214040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7215d4366f8f189e40dfdfca405d1e3adbb9d2dc8983aae262042cd28b2b633. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM42K2453452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba5ebc5f2179980de9dfd7561e0b50879578e13de1407c4b5ad20818450ca3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCJPL2018639.
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 0x9a36c28919da8325107749625869fdefc5e3570107bcd9176dba170136722ebe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2409881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d109a7d45a4d049cbeb8463cb2206ea56017e58e96f3e65279f41ee971b657. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TCJPK2098832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa997915689b19aa46d6fe7982aed622294f977a7d733841a081c10f0c3c58a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TCJPM2079272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe295924c4e7c14b312b4dfc0416c855ba04f41ab19fdb7d97584fb8e5345776c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWW2187855.