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 0xd1573b1e25ff9f366bc30b6101be400df6eda53a3e7a411fe9a786e1e5af7c84. 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/954b02ad-a7e5-4730-8452-a2a94f3b878d.json and https://artists.proofprofile.net/proofs/artist/954b02ad-a7e5-4730-8452-a2a94f3b878d.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 0xd931718943ee79c721584f1c7a1333ad4c757878ef2f68b5af7bb8fecc5a4730. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLF711805129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364334e357d64bfd7b37a59c8e45e58048351c7ad58d7e247910af1525f0e5a8. 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/NLF711809771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac04e063873d34a4f80555a706ced13ae19398037063bed407a739ff1db51a. 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/NLF711809774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b20cf88e5364ec62ef51e50e78095fa21e3847da0e159092ba6145fc42564. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLF711809768.
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 0xc0e4da883747f4cb78efad29bfb4ea039903385308c0a611214118c5ac798a5b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLF711806515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a95024568ca0794c1891d87d63ae029a706f6af2356b3e9bfd9f40816f0280. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/NLF711809772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a8a19d34d0de8f369d82403931205c2c06b6f5b45fed3ba7238339a2bf496. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLF711808410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e8f175f7708b63a266d744644bbc6884846a70dc84d6e3446755636596fe33. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLF711809777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5c739499ade916b72f52545d8014ad7b89703554caa8d274dbd9303c401fb4. 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/NLF711700700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756abbba8e2f06e7895a1597edb18369ed1fc0200cc2e0ed8dcf9388f16d06dc. 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/NLF711701796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0c704944480e63630efc66932dcd13e2a80f965141992802f8d9822b16b5b5. 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/NLF711701801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff4d70f3f1e44ece22b077642a53bb3db487898df079c88fb6324cc6f4089e. 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/NLF711701802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320303831d979ddfe19aa5f5bd64842d0de88f814a1d74a4b60bbde577b9029. 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/NLF711701805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e36c5699c8df7e5f1ea4753d37da438ae8b4836f73a9cff5932e0d704e2fa. 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/NLF711701780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136aa91b462fde6cb4a9b7c8d6009f9bab679d5c331016e173d408ca0555936f. 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/NLF711701807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64259bd07e40a2b694cbfbb6ee008144aa29e04d62d5171fb2a01da3a6ba622. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLF711701795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca93edc43c8b7cd67e549f2ac416964c1bf19eef9455ad00212f94b97f820d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLF711701804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c868be0b84b5d5c1d2b496d3b1685fd5ab3ad63b31634b6310fff86c5fa7a6b. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/NLF711701798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8e501dc26f968d073e5d1aa44d2caf65ae85c547350d6cf54590e138e2a6f9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLF711701799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974c292a82d9df81957ace016b127afbd4fd211a685c3a85ca396a4b0005d48b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLF711701803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd750ae67a63aafbd0daed907ef1c4016f87bb4824fb6317a482cf9b238b056. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLF711701808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88949f32099ecea7580e4f920b87866723168eda38ffed14d7a759a6649a7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLF711404413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b4b2ed13a977b44aa7f6c66e644a3c71720f20ed72a6ab19e25feecb27a73. 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/GBEWA2303763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a70c5e57175c3bd90228cad5019c9fae432c6d8d49888f7bfb0179e59d310. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLF711700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97200746ea888ed07728e502aaa8d309edcf22a0ae68df3866c90f48f2e520d8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBEWA1904439.