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 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 0xd8f50f0ea46337b052eda3765dd5218367107d39601eb41c7f6fc269473350eb. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fd443bb-0c56-4070-88b7-e3bef63dae52.json and https://artists.proofprofile.net/proofs/artist/0fd443bb-0c56-4070-88b7-e3bef63dae52.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 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 0xbba8e4677cc15fd40d6bdfdc7554ed5196e9fab4de711da87b5bbe7f3fdcb421. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W12000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc6f349def92a4ff0100444ae68a237944ab662510109ee90e8447231873d7. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/CH6542123481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eab278c6f65bd992ba51aa27f60bde129a9c5282239a5cfa59c15ff4ed4101. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH6542268150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3833c4ae801c5316f0ed3ef53c977669158ced373389ce3c501cf4eabe886f9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542293591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2cd5b267930d69ab6ed20cd0e71b179dd8bfd0127759502605da5ca23438fd. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/CH6542293592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ddb48b6a60e1f3d6f0cd5a37567d81965389bba910f6830e9465eb9bab3c4e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH6542290967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65628dd0c3fa8bdd551615bfe80f77a64bd1a07374e0ba99e05ef04a1b930fd8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR7Z82400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7814ae1a04d7c0466fa8a85e3e13fced83a477ef869c5a7ac4a4b94f3aa3c218. 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/FR7Z82400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c697c696e29c5662a1fa714fb43d58d85242cb3c2639ae144205e1c07986384. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR7Z82400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468cdf5bbd279b461b601a9864fc46671d725dc2339c532d897b3ed03f411ebd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7Z82400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf543c1e5534576ab88cdeed36fdf1c7927f139bd1be4996e41cffddd85a2fd89. 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/FR7Z82400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65628dd0c3fa8bdd551615bfe80f77a64bd1a07374e0ba99e05ef04a1b930fd8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR7Z82400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d974a39a711a2e31491a0f4e23573cbbbea151856065e7cb0026b54bdcc3c34. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR7Z82400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b83770f48258f58659936ff84a064871f80948729610d8bb212dce4167caab. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR7Z82400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7814ae1a04d7c0466fa8a85e3e13fced83a477ef869c5a7ac4a4b94f3aa3c218. 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/FR7Z82400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392fea3e32d787c20730f7d207d0524aa1f1dfbb59627b4eef06f81737a7cb35. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR7Z82400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c697c696e29c5662a1fa714fb43d58d85242cb3c2639ae144205e1c07986384. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR7Z82400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468cdf5bbd279b461b601a9864fc46671d725dc2339c532d897b3ed03f411ebd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR7Z82400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf543c1e5534576ab88cdeed36fdf1c7927f139bd1be4996e41cffddd85a2fd89. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR7Z82400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865776df30f9392a03385584c20634f49a9aa54fa5ac9bffd720a32938165c08. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR7Z82400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65628dd0c3fa8bdd551615bfe80f77a64bd1a07374e0ba99e05ef04a1b930fd8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR7Z82400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d974a39a711a2e31491a0f4e23573cbbbea151856065e7cb0026b54bdcc3c34. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR7Z82400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0259bcc8c4d415e1a4aa416624fb61e91fc6d7c2ecb44ce7c22c132f3f35509. 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/FR7Z82400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b83770f48258f58659936ff84a064871f80948729610d8bb212dce4167caab. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR7Z82400122.