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 0x577aaf00ba04e89fa1f99b44cb5536d6ced15f119d8d2d0a0812a8fdbf1a17d0. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac593339-3d13-47ad-94b3-de0e61e04e4d.json and https://artists.proofprofile.net/proofs/artist/ac593339-3d13-47ad-94b3-de0e61e04e4d.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 0x69965fc655da40c627f1b1140d2267219308e348e0936ce6b408a2e57f350fd0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:17Z), 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/ES64E2469152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d629505511a028530de35b2d1c3c5954dcb0c3a4d1c0365193c6210a4ab01e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES64E2469155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a66d2ece4087eb7e06b78dc64ccf35fd47900283b7e932365223447dcddad40. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES64E2469156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8663e2369747a800959ceede870b37dbdb353551ec18087eb9968a68b65046. 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/ES64E2469150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2fd1c4637e7b160bc88c1b42a14442c1c902649d04cd7bdfc7f6652d60c6df. 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/ES64E2469151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e7a8ffae577ca0a4e8a8c0049bb3903557fc246d468a0add4f00b3093dff6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ES64E2469153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04be7baa81acc4d44a944e414fbe2d2cfadf85ba21e1783905856ed848031e. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/ES64E2469154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d629505511a028530de35b2d1c3c5954dcb0c3a4d1c0365193c6210a4ab01e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES64E2469155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a66d2ece4087eb7e06b78dc64ccf35fd47900283b7e932365223447dcddad40. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES64E2469156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dcd9bbfb2c9b796dadb29b229d610bf15eb502a40c745918745ea32ae47a0a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES64E2469157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b450d3b8f9a720e013624e75a3f5df4301388c7ce72f1dd4adcbeb98c363f0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ES64E2469158.