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 0x24562962db2bc1be532fe9ebca3141a00cec70c503b7046135d6bed8755af7a8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9e923f5-f0d3-40a5-84ca-6cea6139d0bb.json and https://artists.proofprofile.net/proofs/artist/f9e923f5-f0d3-40a5-84ca-6cea6139d0bb.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 0x147be3bc0e23dbe2006aae7a69b68bb19642feee48746416138f8368a6271df0. 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/QZPJ32377398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2349a7dd18b5fd354095ea5af5bafd5bb8103286050265ecffaca5c10d369f. 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/QZPJ32373121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33ed936ca8a8a56fb253a20c71f6312a182cc478226f7a965d37ae736cfa20. 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/QZPJ32346800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb8670c77543fb81f14e78fb83fb6212c202315fc5c823d724ea2a4d37a329. 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/QZPJ32322086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc970d44cf9fb7956ea17590212c6a8ae984196beda1c3b271d82ec9e22b385. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPJ32278840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebdc81d8083cd8595f3eb7bc549a3dfdf473d1b0c6d2cca46341cbf6b6ab032. 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/QZPJ32268198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3ed09ca6136540d5a2ac5bbae7198760e552bc532a9e260ad9dba5795f50f2. 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/QZPJ32236136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bad853e7bda28c8b976302194bcf0484dbd6b3a64f41c7c70b4237205ac7c99. 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/QZPJ32223082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4005d4fd235bda48a467bd71b2e0f20b7f6bb0a802ce5a30ac3946629ec22bae. 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/QZPJ32202954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076d17007b5dc36a00be5b21cd900f16ca294f9e2b5b902446bb14b472d1fb1. 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/QZPJ32200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a7599c43027ca95514c12c9b42d2d4126b32b3bc895da056d4099d65eabfe. 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/QZPJ32191199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1936035eaa65eaeffa275aafda5950e3cc1c6ee81e410c735c87d15afdd14d. 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/QZPJ32187603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1fcf5affc531131da240ca0243ddb18102cccec5119e1838b835208379e500. 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/QZPJ32184115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f99971a3d8dbfc49d194d80697f491c9d948e694118d147eb4108b9fe878a. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZPJ32183926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1f69a689095adc80c509fa1cb612e1110385657a9a5c97cea4d9935af26d3d. 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/QZPJ32179787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0b69555ef32fd6b73f322ec5a99de07f93e98bde3072dc0c0886717b9d3165. 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/QZPJ32177878.