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 0xd0e821b9d4a6e4189f4976c65e65d42da4eaa98353e44fd978b2f0c28f9c603a. 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/5c532fe8-acd8-46d5-96a3-eb893b6ef3c5.json and https://artists.proofprofile.net/proofs/artist/5c532fe8-acd8-46d5-96a3-eb893b6ef3c5.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 0xf02d233741a6d5d9bea3dbc3ed37f157bbcaf5382663d82d0eb7eb40f514cd87. 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/QZNMY2137783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824194641eaa522aa949cc60ae3ee4ef60e6dc82e8634601a1bbaadbdb63748d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNMY2137786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7887667fb347f0ea133886892360de6f85f8c9bb208e3b815124f4c3fdd7584. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNMY2137787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b1c1b3e4330a6a8dd016c929ee5f30442db51edaabc0d3f30a74f260a7b36. 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/QZNMY2137789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ee0ecd365736ef98a738a768933298706b930e420d697ea0d337e4d38bc3e. 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/QZNMY2137795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9d1a6f985ad375cd6ee48188e33a6cd10ebeca91e7107a606586eeba0462c6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZNMX2281156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ae318700b878b314ce7a517d02f56542ce4277ba5a88b544c6b6202e23d3d. 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/QZNMX2281161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae85ce0aeb12f7d0ff3e1e5318330fb26bac5aa4290cb62d9e361778ab14d9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNMX2281166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d298db6812e14aedf275048a9e4995b1184a502b6d809c06194c462351f5ed7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNN22225934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2809ce630e407b9c6b4c29ce3ccd7e12c3548ed85f91f84f21c8f746c0430d6a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZNN22225935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da5cceb7bd8fe79a7d8e6d3aa0ce2a3846c14175f041fe8f89a010f120b6455. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMWW2364719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa9b7a2fbf577ad4cffddd17602b203c6d04ebcc739e587a7f89ebca9e474e5. 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/QZMWW2364720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1ceff6e59b51cb0b0a103a7ff2ac7fec846097c724f2650a52f23ade32466a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMWW2364722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ab68656a4ac766e2bfff8c78768ed7ecafef7556837f979137b43cc15a380. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZMWW2364728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14767d4dca922cc54f4217a326c33063e215eca07c6412320117650860c7b4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNN22380966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4146d62954e79df01d20b2557a33026bd2796201a6ffa72c25504d790faa9. 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/QZL382475216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473584bbd14bd9ec746b25fd814d597c194a8c98d7ff1a12cefbe4b245657f61. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZLL92463594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df86087e37bf132279b4933eab69d4586e0c197f5e78fdc8bb96e1c61e160a5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZMWW2461957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4de1d669ff7a06f44780a7368c09aa9da146603b2831770436c07fc5b6cd67. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMWW2461959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e638dfa3514d952e2f41146bbbbcab2a531fab855be3bc3faf2063ef605cba5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMWW2461960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eea30756f84366e2e5f64d7752a11875ae02e0a9d68856c441bbdf75c6a002. 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/QZMWW2461961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f908ed7c1211ad81de0cd46eb280601d7d5bfd3a79057feac7f4520a4ddeed. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMWW2461963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e06e669f1eb5282d21edaba72452661324f2cface25b983855b962d6034c13. 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/QZMWW2461964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44f6a4f310a6e7ed8653c2a141d73bf098b610f7583d0eedad7ecaacb2e6ce0. 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/QZMWW2461966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3544f199f42d4727b09b0798b9d24467a4d20b8a7099f1fcd5e5184722a252e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMWW2461969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90724ff1a4448551e913e988d5d48ebcd6d6e24da75d4802507133960a4f1ce5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNMV2482074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f1d9a0b8804021cab825bf485804fa5387dabe48f90214dea0fd57957bfc38. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNMX2429243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6afa3c41217965637af642f9780d36872f7ac66a39c8a14c3ecb591787ae95. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNMY2486352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece77c350daf9c9c20bc6ec948b3232a3192922f3bc48351dd983b844fb3a2c6. 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/QZJG52509828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95181b72118e5e46e7d5c7b0bd41837facd4a60e37d2b21653e3a7bfa95300. 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/QZNMV2579785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359088ad4cc5d347baa8cfb08f8599abc53add53c6bd2232ad6315134396582b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNMX2500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8a432ec5b09b61d15115682ec7d3cffdd1ec2975bcc567e15d26a94fa50515. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNMX2500841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d48711bc0b4ad29fabab77ef574a3b995e9f078f9ac207d501cb0fd6acb3bb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNMX2500842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098542f24d5a28c010335599e01c3c31661e6ac43c90b96cef1f02db66edfd9b. 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/QZNMX2500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30da3c40811437e6a6a07f97b6c88e13784c172113d3284b93689fd6719ab5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNMX2500844.