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 0x85a7f2a75023db4da5353831d8d5ad82f3a8fe436c54ac89cc3b5ba5f61fdd00. 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/04d41ba9-7686-4ef0-a765-600ab0f7cc83.json and https://artists.proofprofile.net/proofs/artist/04d41ba9-7686-4ef0-a765-600ab0f7cc83.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 0xfe8b911aae4fe94a3765c6321620d6ce3d9b8790e8ef574d716f656ad28c1efd. 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/DEAT71106192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5071291a50adf37e805291b11384637e4e029aee4e2669193aae23932b131ab3. 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/DEAT71003895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b45b35ff15dfa4ca5ff85327cd685c88deb824a0b90f6242fdce9217b515357. 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/DEAT71106194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7700559960804d1e1da016fb19c7ef9fcaaf5bebb2458904d205afa3ada439. 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/DEAT71003897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1352bc716793d5824b86ba5cf54ae7663acaf375bfa2e38f367f0e55b14166. 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/DEAT71105441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107e027d86e1ea376d085d2bdbcbb12ee7ad62569cc3669fdc8d979eedf62a8a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEAT71106203.
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 0xea73eb0121005511875c8fcdcdcce59dc566912816f662e4ba81c6d40329af67. 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/DEAT71003430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3bbab2fb86cd9d5be12bda01129d0635a2ee01b8436b4c87a51f6b8b7b416. 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/DEAT71003431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2e4ab3c54ad58fa7be568f87aafd527b6864d589fba104f173b9d761bdc15. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEAT71003434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36b3f6ff24f4ad8007e771943bc0c3b0c818e5df87c13a342fe6516178f4c9e. 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/DEAT71003435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bbdba095285ee3bfadfbe36906f0c5efd1d07e14fdab141a83184395cffbcd. 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/DEAT71003436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1654fc3b7c6fa78b3f53be2faacd4d9b613fdbc48f7f179a382dea5de165fa33. 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/DEAT71003437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c9ea5904727524e4792ab728133863113815bf4a3577c1273050e37707a80e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEAT71003439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5072bb5a7ecc69700e0b6bc904453f29af69150d39315b7eed4faa194a2815b. 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/DEAT71003413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02c50d6c8ca75854fecb1dedb3c0b0d49545f5dd3914fd84692dc0e6510a5c4. 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/DEAT71003414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7c10e146cc6658b929201f31337fa82feb6235896b6006682d42dd6e36f32. 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/DEAT71003416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa676c86588e5f4351be0a26f2beed58df4e4817b0406b88fa738b409580adb4f. 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/DEAT71003417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b4391459987ac893cb5a53c7c31f63cce369a971719846c44716f0b3039adb. 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/DEAT71003422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eb4d15ce88b2ac147252dc687f54335f8205075c0e143b298e71786df07c8b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEAT71003415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab88084ea8b389c2c5f2ac0c38f854e895880c76830597cfc434b35a4be95a9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEAT71003428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f96362dfea7f7f20cc2d5f200abf887326814a0aa357752ed139375ebdc90. 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/DEAT71003399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fcfbc86a2df1beba23b642234e03719da25d30572775d346d12325ab47103. 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/DEAT71003400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89f682cadd802238c6eff84c1a7a74246ada20e6b559ddc7332d3000cdc0d9a. 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/DEAT71003401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108f63ec84c3b96b4a3c0648408401f1ec59ac4dbcc638d62bde979271455427. 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/DEAT71003403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2da81dc8a36548215ab88b989f6ea241c7e8b1624d417e2a0196e421d3e190. 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/DEAT71003404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5decd4183c32ba5b90cd5ae76d99e8015632a16e999533196d0f93542403392. 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/DEAT71003405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fdaf1642fee09065b1916df6ee2b02797ec3916b47739b16772685c5be57e8. 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/DEAT71003406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e063ba4bf333ecb1f8a2879efa1d2bdb640b98084614334565a4bf29214438. 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/DEAT71003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f08719aa15cd9281e784ea41ea377e15983b829cc09b32a9af7d1683dcd5973. 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/DEAT71003409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11088d995c3c9615593dedb3ed388f587594cda2410f821703125bbb263532db. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEAT71003402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e5bd4899b1409fac1aaf5f11660fe44dffa2bbf0e004df86aebcc92ed2c52f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAT71003407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b1a72019d55e957756f7b6862efb5061080478a2c26edc40648d3117851a3. 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/DEAT71003370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fbbbb5bf3269dcc51b4d34792173cc9213d2bc3a1f03d15c053686df60b820. 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/DEAT71207002.