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 0xd5daec8e824372f5c3cf0aeb8e1fee13a29de88783c11ae52183e5dde30331b0. 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/ca39742b-7778-4eed-888c-8aa4e4ea5dea.json and https://artists.proofprofile.net/proofs/artist/ca39742b-7778-4eed-888c-8aa4e4ea5dea.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 0xa416c67ef2c6e14fe056b68a2469800f657c47dc90fbf71464ec8712e0f1d3f5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:44Z), 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/USGR19610113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d0a67d55d2c77a83a8d84d9b3e88937c045b14aab3e968c4c22a816717e6ce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USGR19610114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d657ce0c18bdda1530adca2755a0dcb334f84150cdf1353e330da89bd890a39. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:31Z), 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/USGR19610115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5fdfc34d592902368a092fe0fd036a5135cca66257d25d10f8d121f11dbbc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:42:21Z), 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/USGR19610116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8394e70b26f0fc2facf2e648233ea237c5b735b62f78e6afbb1b2deea35ad7c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:44Z), 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/USGR19610118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e166947c4ee686186fe982049e45c319d34ee03b08006e9e78f0784fa7d54. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:07:27Z), 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/USLDR1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd7239ffc818f50c18ad6740df7ff108cf6d51108dabc52732159a41928ccc9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLDR1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84898fd1817099cfb0fdcd49dfb6a8f5c360294c9a01d875577114e4ce8eb57b. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/USLDR1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321a4b98031290908706b4c18e36aaa17fe17ce851f7828e02b73d51f5c944aa. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USLDR1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d6d9d8ff13db3565c5ba2945918f7ae0a6d877c42b0b890be1bec81f5688f3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCABI1212874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8383e574f3eb9b55e8714b35a4e9d1da989a3d53cf3db023925f34d065d4ccb8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACB1494752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2d4444a8bfd5961b8eb969c212a28d1c5cf09f15959be32d3f2baa834cb23. 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/TCACB1494753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc155f8f67433535e849748fc5edc70d87a59deaeb217182124e3e2983c797707. 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/USA560905745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3a2b06ac0fd8c8ee81cdc42b013ba12aead4b58d50d019268805651dc8dd1. 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/USA561156498.
Until The End Of Time - RP Remix (Explicit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b6f996d4422940ef4ed1a0e4c5fb71fe27ad2121f4bc94a7777b2861054cc2. 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/USIR10110259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763c44c6241a2084cd49da9ca3b90980551916180cf5236e42deb0da7603fbfb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM91844644.
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