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 0x3549614b51d69a972c0e43acd5c65eb4acc59154e7ec421e39eec3c2c623d314. 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/30d4fe60-30fe-421d-be1f-71e7feb2559c.json and https://artists.proofprofile.net/proofs/artist/30d4fe60-30fe-421d-be1f-71e7feb2559c.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 0xcea690d1f2726812e85e47d517d6c53e7aea2afc62dc40b9eb0b21f3fa8f50c3. 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/NLC340718004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea690d1f2726812e85e47d517d6c53e7aea2afc62dc40b9eb0b21f3fa8f50c3. 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/NLC340718004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a64dcfc9aa527e8fa082c07df64164896e8223e0fc98c281019807a4fba036b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLC340718006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eaad68a83b5642bfbeb94cacafb81988fc3693295a8e1d14092b6e94858831. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLC340718001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed4f7b49c8faf4fb93f861f315306277c7985bc63790770cf0e1622b7f9c61d. 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/NLC340718014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c10b22e59fc0a15d11d8f0db627f6c4094acdffd19208128ac13dec3ebf84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLC340718002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618205003514664be96f893e0cd1d63fe11bea933fa94fbeb4784182e4e52f7a. 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/NLC340718007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a3b279008d4af99760813e340c137517f271b9a134d857a51c68eb200f5384. 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/NLC340718005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe075552526694438be4a9b2487a0c4f35cd397322deaad8b8cbb14d89adaa270. 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/NLC340718008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1201ded44ce8073779e5abe0a6150009bff5341e9e41ecd9f25bd97f2062ef. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/NLC340718015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f58d82223dc28327669a44295b5b97680591319af9aaf516da29fd6906750. 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/NLC340718009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c30883ab562cf847a9206fa3ab678ec5632006cc4fb847333934ebb7e8537. 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/NLC340718010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58be2ce72ef7ef75e1cf3074a7ab82dbaf1492c2395898449756abc7f71207f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLC340718011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e15c38807566deae652e1f205218833bae80eb0ba43ac2862cad7bbe912e4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLC340718012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f089e104e3556940e0fc5d3ffa8053d0c6e8e1b0346a0bf3af865e5d61bdf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLC340718013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef68c8257753cf7cd38627903d0e1bcf1f39a3da259e41b5a51f43ce9c4c39. 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/NLC340718003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c10b22e59fc0a15d11d8f0db627f6c4094acdffd19208128ac13dec3ebf84. 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/NLC340718002.
Holiday - 2k12 Mach 10 Hardstyle Jump Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a8bfd16865a641dcf726e8476ae1e3468dd3cf44ba3e3509dab8a629a0169. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLC341218001.