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 0x7fca5eea0c9b69763d59f282ff06655184bac7459af985ca5c7f5ebcfe2f9229. 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/429e4c76-55e7-433a-8e02-b543260ee1ca.json and https://artists.proofprofile.net/proofs/artist/429e4c76-55e7-433a-8e02-b543260ee1ca.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 0x172e0cd1f2683456e46ad9a6899f8c63c72585c6bb0a31a907efa424ed983b0c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEE881612802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe922278e0b7c6c6b24ddf5a8316cc9f619c0ad20b3d08367b04ff3300a19b801. 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/DEE881612808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3ec39e99e207164fb993add0577ebf1e618324c35cd22ae9367b8fe638a07a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEWA72000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e1c2dbca665dffc20bf510ffabc914b7e9472210f0e62141e333bf1074340. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:36Z), 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/DEWA72100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68625503c322bf503864169fd4d8481e3a52bb6b3c06d1bedfaaf5d3d8f255d7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEWA72100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778a30ec97dafd534128a8d3a3d737be37d18f64e21a2b41058e18a9054dae5e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEWA72100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd2a2f89995fa1ff1c4c7d08ddf4ce4e9aa7dce758be26b872851268c2cff0. 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/DEWA72100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d0d98ff46b6838d47ec786aa2e4ba0f772763e90269389801a43559194c501. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEWA72100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57784c0ad03fe248863470c133512cabbb935041ea292aac1119a3ed8749ea32. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEWA72100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f287219138c3f49ebac52176807e42ff81645e8311c186c7a8ab24808baca5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEWA72200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8376359dc33465f8af29c1825b3e5439adde53736a4185d50b30e467ecba18c8. 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/DEWA72200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1982c69cbb56328182f0e77bec91c332a0e19998765c2b9291e75f06833de06c. 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/DEWA72300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81eb059002c5bcb6591989b9f1e6eabb57c6d8a4bb74a6238cefea73b3ae07. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEWA72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b12a767004c4d9bc61e0af4ad0e5c38b07698a027f8665bb514b27a93d790b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:43Z), 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/DEWA72400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2cece94e8685018f4db916480ab9a0dc1863e8b9abc841bcd0b250320bf9ab. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:40Z), 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/DEWA72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4db900b0b48be300d984e9856c4325d4f625d5b7a3b5853c0431d06b9853e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEWA72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07884c7dc0c7653a6de01bb385bbca6657a35561dbc7350d8adb4a7ba570b5e. 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/DEWA72400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8794d30f2cfe31d3e52c3191b00e062099dee9e1659aa0affdf1d6451d7bff. 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/DEWA72500033.