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 0x4b8ae24ae3296196d13be83ce4dd05e0aee9c4d49939fc3a14fd1ed706c098fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce15e2da-cacb-4973-b6a3-9741a317c86b.json and https://artists.proofprofile.net/proofs/artist/ce15e2da-cacb-4973-b6a3-9741a317c86b.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 0x54d330c3acb6c2af4b385d83350a2cba690fa7ba11c1d8d739cb1805be4170ee. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ42196739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d424916cfd0beb63c40412dd0474b926679676efbf5e0b677ae77c9daf5ef0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:53Z), 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/QZFZ52150010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890dcb721c7783597ca50cbef295b44afb86c9353182027894383d494be3b6c. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZDA72194543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3e0cad932eafb0fd878845653643d598854a6beba3e0d9343d37525dc0ed5c. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZHN42105028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564a07fd62fff8b9596ae774e0bd099598f092d749ee5c16bfdd2ff9b062f09e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:57:41Z), 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/QZHN52179454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81003b93890e4c221fab2342359320de6fb3017c9a2eec536d26fb23cca7a285. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:26:52Z), 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/QZHNA2192505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de6cdf74412d5de0e5168b1d47a8903dabc27b68225947b17432e42fd901753. 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/QZK6Q2197486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6856650f7eb01b32b098d823338f19cd0c7276631ef0cc846549d4af9d282be2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6P2190979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4108879441066ef45bf72c016ac32a789038ea347bf4363b37dad5d769ccaab6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CARFQ2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d3f0a20dc22070356a11b68cf8d6613a629f608d780b47c9e63a24a40ee90b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CARFQ2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba2389be4e8d2fc1cbb55696678158cf9644182ec0af0d826c2c044978e1079. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CARFQ2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a0e29d6234533aeff38bf7467954cf720244174fdb70dc4b7918ec5ecd488. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CA3R32200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c8cd07b9d17440fb952a5e22f8824d1c674ae457004d7a3aa7b57e5d2aff83. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA3R32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c8ce55f61f13cc901ef0a9edd8fdbd5714ff3292c71f8b23d51060c2d3bb82. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:31Z), 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/CA3R32300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdcca415cce309032e45251b2da7b07036d08d7beb0cb6e9839584c98681b86. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:30Z), 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/CA3R32300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3192f73b95ad5164744090b3053a026202da238cc41261aa2f7adffccaedc9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CA3R32300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8d52605775b559c2daa55a4893fda61987ae2364553cce4d5e775fa3e4d388. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:54:25Z), 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/CA3R32300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b24225231eefadf5b3fdf7d1b3e24162ba60a5aac23fb5482c63f83c79bfd14. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CA3R32300068.