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 0x69a432923ee80d2c1f7238d855cb75b0009a3e2f6d736b7a7ad935720b3cc04f. Chain 2 (Bitcoin): anchored in block 954013 (2026-06-16T22:27:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34947567-9cb0-4e45-9659-cc7efaeaef8d.json and https://artists.proofprofile.net/proofs/artist/34947567-9cb0-4e45-9659-cc7efaeaef8d.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 0x84d81f892ccf786d737e495eb5e59ef830c7f150cd1b776c8e2cd0ec7f357336. 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/FR4EO2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa1615c8eb07cedf93f338a7c18ae3ce4e0e3fbbd5a38d46d27b244f87ea2a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR4EO2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4eb1364a76deeea1a21dfeac4dbe23598a658a6e1583a5cc063df614bdabd3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR4EO2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d81f892ccf786d737e495eb5e59ef830c7f150cd1b776c8e2cd0ec7f357336. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR4EO2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d851d824a4449f626fbb5ba1471156d8d1ef2ddb609469ef30d255ac4e1721. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR4EO2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4eb1364a76deeea1a21dfeac4dbe23598a658a6e1583a5cc063df614bdabd3. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:28Z), 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/FR4EO2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa1615c8eb07cedf93f338a7c18ae3ce4e0e3fbbd5a38d46d27b244f87ea2a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR4EO2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0462b9fa18c1931fdbc8d261fc3a1ac7f79df5ca82dc7741a37ccc67cfa2f776. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR4EO2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8b1fcf35040f17e20f5dcb5aeb2391275e2929094b1aed97d8d850ff1d674. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:14Z), 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/FR4EO2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7cf5e02a667cb8a6836a6a419009615c5d808c9cfb35c9a939efc8c5263677. 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/FR4EO2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22134c2a884a424f6fcad463daeb2f1384ba4b02f1b1a6f6945724c980deeae. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR4EO2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80a276b02f485b3b8151e4966afc4d631fd30d989d3bea5b1b5bbdf025b44af. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FR4EO2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c532a675428c6da74b6e85970156c99093b5954358aab258265e64fec5b58e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11915579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05fc7280a4adccf5314358a45c996d97cbf4d59b421b82177d7bc749e30fbb2. 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/FR9W11915577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fcf9674b1532a306d2abc47176380cd14228266955c2ec5d2a5ab16280712d. 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/FR9W11915583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd720ebc93bbfc2d7047231f99720a128de6eaf0deb41dd209e7d32066edae2. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/FR9W11915575.
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 0x974e6aa4ceaf70246368908e1dba82a8b9cf441bb30ba543802ce7388af7c3a3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W11915578.