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 0x3e8681b0f984d06b062243158bf159d3238b645b48fea9e30e59564beec57aed. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aa234ed-2b82-49a0-ad46-8b3994388933.json and https://artists.proofprofile.net/proofs/artist/0aa234ed-2b82-49a0-ad46-8b3994388933.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 0x1c3fa6db151b2eab09ed5dad788a11ea133632b0f415ffc28cae609645c37d35. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWT2278591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84888db0d173ecb3bb5230f69cb22192c12ddbbfe57ac15ab01f1fc55152c3ca. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA5KR2475454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc968d115b59c267630434810725ff02eac0b98ac5fdbcec8f1e863ae2b64d62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2563166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d075dc94d3e7caf21044ac2638193e3bb74dc9a53db2abf2f1025b2eb41c40f. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/QZMEN2563167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68317e1da23f945f47280cc7add612024862b1ded5823508657226518fd4f8a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2563169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5cc99bca43091b57b30adc8e5207c846fdee0af00efaf42175c550846b5d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2563170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c4e8f066948f72a2dfda6a263b4cd4c9b26bc992556a18ad0012934ca301fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEN2563171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b678d879da496a130867f7d47e96c27ea03455d04258147be3cfaa6af2e1e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEN2563172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1c1bc249dc2a41bae610c95e678cf0036ef55860ea5cf55c499ae2bc2d940. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2563173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a5d0b556e9aef47a406ef2907705af953b7a6743f0f542af3757ea9d8dc48a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2563174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0736f572814af89985d34179e7fd7cbc679d9c9ddca217dc1c9b1fa0909c62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2563175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefb0f2a8377fcad49257936b1258a3ad2de21c40cfb3b4905a87a61607471e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2563176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87e841f486c57b8de3035bd53c8e6bfcfd6492c32ba5f382bb9f16eb58ede5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB42410515.