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 0xb679b19a82054f18f67e101121bb4e2091c9284abcf2f31c9acd5b652ff016a4. 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/1a8fefa7-d0d9-4376-a040-9ae9e70d9f5b.json and https://artists.proofprofile.net/proofs/artist/1a8fefa7-d0d9-4376-a040-9ae9e70d9f5b.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 0xf452abb58354278bb6f94e93359a16565177dece8eb9c59ca876175f5469b5ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA100308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c9516fdc5591a39784a5511c5b4637ac6a8fbd3f8b0a7c55107ff6e310b5f7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:22Z), 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/CZA100308011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b61d01ee4b0f2514d794da66e506ac21bff3d17c3f75c29caba583466a8f09a. 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/CZA100500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28836415ab2a5ea45e6ecf758538086187964740a920a78f690f1fdf9779fd. 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/CZE160700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afbc38c3ca80bfdeb6efab3047076bfa0d009233a84354acb04ccc7dbe2feff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZE160700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b90354f344f110e3b2d6484b6bae4a3c07e1917116c808ae1d77bd245b9f8a. 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/CZE561000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909007e1b09a25d01ac5d8b44b13330df6140615255256b98ae704f81daa2de0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZE561000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e3aed06afc275bc616e343dd366b385ded193ab1a9214a59f92557e8588392. 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/CZE561000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eafa8e7f1c33c96321e1b7f99e837cf2978e98a6adb2b2413aa4419c90f84f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:45Z), 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/CZE561000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97765b082da18b19142726b669d08b977677292f881b290950f7b284623b8735. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CZE561000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa74d55c460ca2a98740ce6a82cd6eda965e34883fba4ca79b3caf9924b27f4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:55Z), 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/CZE561000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb0427708afe96d4008bf9b8c9b803c120f90cd348d067beb572aeee030e72. 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/CZE561204003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a98ab2a0e3dd91408415c22c34b4a4e09cb277f6864a60d3fb2e75ac2adbdcc. 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/CZE561204004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ddab6b20b8784d417c82b290f65f369114a0c4df123b03cf6a0eb2de0968a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:13Z), 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/CZE561204008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57c89bb4cac2927af46ec9498e70b386440833d79c9939e9a6a41a5751e15d. 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/CZA100305026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228450ec43aa199b0737cf72d7405f297215199cf707506e0b73c3f2d78c114b. 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/CZA100308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b170db3e70838a2f0b48c110d96c2ccc0509a6fb1fa67fc6af2c13010f0dfef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZE561000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fd800673672d6c137796f8f844a2a08eb3819479a4d049413c5139d43b97af. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZH681900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecb094fb94ad639540d009c679598297c02bffb9cd06c36fec6c6bc46fd5895. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:52Z), 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/CZH681800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d1a0312c8ceeb7eb142afa90351fb2fab6999c69f35d9037050f9e1cf0f66. 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/CZH681900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bd91f4e429bf3fece9732131fcb5f181e5b1f464ae13f0de7ea41d72862583. 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/CZH681900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40219f486a2f4097b66dc293c4487b9e41fa726c85be3ec44856578ac958176f. 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/CZH682100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189c5027f8cfc2a074ce2bc7e39dadf6ac4cd0121c27473603bc740888fb9852. 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/CZH682100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed10a3db83bd20e473f98942bdfe90ad6356b1d558a308856ad89d47c7395dd2. 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/CZH682300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c7f6fe09ef6643b192a473b6f9c991f56daf89372e996182daf46c9da57a71. 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/CZH682300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075338a1203390f64c337fe06710e16f064e25bffea728eaaf63d5e648c4f9c. 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/CZH682300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e061173a1d5f05f80fddbba1e0e7da398537f27f703ada186e9ee993983b2a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CZH682400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99c653de3b0ca1318eb298acde250e22d540fbecded584081a385b0d86086a1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:33:37Z), 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/CZH682400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232808529a76a6234a1f0ec77cc02a89ee5098dad72e01116f7aa5b290d2065. 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/CZH682400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6702dc649a22ca17f4868cb6515703caa9e198cc6b29260c28676f45c4021b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZH682500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e061173a1d5f05f80fddbba1e0e7da398537f27f703ada186e9ee993983b2a. 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/CZH682400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d2e17e54b0320073bcea0f6d6aaa3729436b8cc494d56478a3ae129fcdcce. 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/CZH682500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fca0691e27d0e54debd153a9298d6e54626bb018c939ddebe5ceae39222d3e. 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/CZH682500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873f3e7e2ae0c4ea5ded69967ddb652bd45e736a2cea8d2439b9e0f3a7bd5c7e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZH682500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef4b02db091485d3308c0f1c7017c19cc0cbee606101dbfdfa5fdf8876b50a9. 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/CZH682500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ce2ce174fa959e555b09e44d2ff29e08b7756d2e7cf27a8652881e048427d. 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/CZH682500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3f7bb8a7c96f7a0436f363edbaf261664b8b7656632f6ba1357354258a5fa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZUM72500425.