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 0xc4956644f530a56b2ee20dc2f312c28f53071d7348f8db6d4d45cef28c2eb882. 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/c3ab5e1e-c40d-4391-91d2-73626403de64.json and https://artists.proofprofile.net/proofs/artist/c3ab5e1e-c40d-4391-91d2-73626403de64.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 0x81da53229a52fff551cb917c95e3906e007787f2e9ee6b8c7c56c8adb7db11ef. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZDFP1915160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45c50648e705097fa420c9a457c3d86b9f11fd4bc633e51cb2f30156767c1a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:05:07Z), 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/QZDFP1915566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d614f4b855b3116e92566ca03ef6aa27d7ee15c56ef6c7baff7070d317e903e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:04Z), 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/QZDFP1915559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cab4f80cd57ba643c971e17e34590aeb5dad876d1d3ef82dbfec2f45d96553c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZDFP1915571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73707cdfeb876c1b8def817325fef4514fed3fa1a3a4fa229b2f2fd83af2885a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDFP1915562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2012da313b431560709ada910db9a79496685a4fbb88b6159f38309df78190d2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDFP1915565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a968b6c6cc7a45b9ff2d2437d9067d74230d7b5e1ac68e2e11991b73588eeae. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZDFP1915572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbbc15bec498d7a2cc2f29d6e7a519a77d4b43d189c3d6dec7821b23f78d3f1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDFP1915524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ed4a28b116fb15afb860dfb08a8017a316d07d84b73a4a0748b8922500703. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZDFP1921840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39d96ed82d10b7907825a175369b2b7c7d2f997f796d789f2c9431599d764e. 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/QZDFP1925156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3591edc5a82eb69141a0f520368d025c9eefb6cfcc034578a7a49c9337b30d0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDFP1932480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91bcb48bd0b5fbf4f83dc0ca9a8bc1d20688a7ed058d1a12ed15a564c493d61. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDFP1967289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38513fd541466544f0ff8220d89933c4ccb3a6ce4e202ea87efbb6a6d1172d. 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/QZDFP2048985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaaaa44e9231ebdca1989c1a67712211b9b22fd7e4478b73b334f7abda20232. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:48Z), 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/GXHAF2500788.