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 0xec766baf865cd8be2e1c4d1acf03ba80c4c46a3b10fdcf93212631d2e652ae36. 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/baa75ab8-ade9-426a-8508-45a7268628d9.json and https://artists.proofprofile.net/proofs/artist/baa75ab8-ade9-426a-8508-45a7268628d9.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 0xf94734b0a7da11e9ae767f38c79973cd083eee84666f34b1cee6caaa1b0d63be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SGB502246485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394a41e539ca527cbd7e48b4f1dc93759427e2bfa17804f9b2574e96d2260e41. 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/SGB502250267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c74860e83660e4ce554d22cd1fe83ddcbcb8fa4accbb8b6ac1b72a728aace. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:05Z), 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/SGB502251331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b45f7d84d2f5a9260997d9d449f841d9156f663ed5b936706a0b36012afcd51. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:34Z), 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/SGB502251332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d71da8106f9b50004d759735b464d0059309f77c1dc0daa07e554023617e77. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:31:59Z), 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/SGB502248490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d7594bfc843ed693a42f3ed9eb540f9afc19b2bc99f167158b98fd2f0202bb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:02Z), 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/SGB502203194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94734b0a7da11e9ae767f38c79973cd083eee84666f34b1cee6caaa1b0d63be. 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/SGB502246485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394a41e539ca527cbd7e48b4f1dc93759427e2bfa17804f9b2574e96d2260e41. 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/SGB502250267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268df9a281ec9ec9ddc36e2b6c9d2000406cf4acd507415858d852df5631275. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SGB502382579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268df9a281ec9ec9ddc36e2b6c9d2000406cf4acd507415858d852df5631275. 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/SGB502382579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891bddcfbbda4adaf3cc38c618eaf416a04af6d19a38d02de833758fbcc7df3. 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/SGB502384555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891bddcfbbda4adaf3cc38c618eaf416a04af6d19a38d02de833758fbcc7df3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SGB502384555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bbf2f8f8016b14ef192d0fd50a270be8b1eac11908736c8feb97c0777494ed. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SGB502390887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bbf2f8f8016b14ef192d0fd50a270be8b1eac11908736c8feb97c0777494ed. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SGB502390887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a8b34299699b99bbf9262582382dc78705cc59125c78242390f72d1a990fa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:41:11Z), 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/SGB502392996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a8b34299699b99bbf9262582382dc78705cc59125c78242390f72d1a990fa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SGB502392996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b06b7b0e40236eee3d114d16d69130f4e8b9ae8d1027595fb3e859f3c4ea7a6. 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/SGB502394174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ae9b3b90e6be2e9c33b3ebfe2d802a3571753d8bca42ad073c6249bccd079. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SGB502394744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b06b7b0e40236eee3d114d16d69130f4e8b9ae8d1027595fb3e859f3c4ea7a6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/SGB502394174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268df9a281ec9ec9ddc36e2b6c9d2000406cf4acd507415858d852df5631275. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:55Z), 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/SGB502382579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a8b34299699b99bbf9262582382dc78705cc59125c78242390f72d1a990fa. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/SGB502392996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891bddcfbbda4adaf3cc38c618eaf416a04af6d19a38d02de833758fbcc7df3. 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/SGB502384555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bbf2f8f8016b14ef192d0fd50a270be8b1eac11908736c8feb97c0777494ed. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SGB502390887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2bcb6f45921c0b6e7793bc107ddec6d8a16648ade96e27a3db30a94bf02b67. 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/SGB502390888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5728995f1807803ce56d28a35e238e98d4dc0933fd874ee3f729bdf2fb9e7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:43Z), 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/SGW502502612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5728995f1807803ce56d28a35e238e98d4dc0933fd874ee3f729bdf2fb9e7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:52:09Z), 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/SGW502502612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6205e2cf39d0503bd684d7da38921c992a8f3f3d8d00fb465ae58473892041a2. 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/USZXT2350912.