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 0x6496c2ab7ca25cda07f939393e44131e80c76dddf76f5b9ea089e090164a5023. 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/3960946a-14a7-4c5c-8256-042e76726c0b.json and https://artists.proofprofile.net/proofs/artist/3960946a-14a7-4c5c-8256-042e76726c0b.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 0x4c753406a3d458fef7886288612bb7372ea1cc12a805817866590d5248c13d77. 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/BEP012212001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3184f1e27983d13cf73ff1635b527ea17af3831ebb99420fd94b0c6360583f. 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/BEP012212002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d30299107151532cb56b3a693b11f0330e3d1b798cfe6d2bc7cfb60d61c1deb. 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/BEP012212003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ee2366337d8de06953758c2f1da758e8e478d73b06cf774cb550aa29370492. 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/BEP012212004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf35a06bdc88e131aa3faaa14b94b490798d16721903babc301b51ed5a075e08. 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/BEP012212005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495e791e0b06e054d3ef4db5bec13a22dc9142874e81e26e5c84e2e80935cca. 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/BEP012212006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf7a634b32f4e1d6a136fe1c8ae14d741d27563193e8cb2d7e6be4da6070335. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BEP012212007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda8d5f00f286f635bbef7c654907688b6d0a1900a34d8ddf86006f01196734. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/BEP012212008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c4d86a72dfa66755a9108d3fb97836f69d427c8f7a54abba083c04b9f3e57. 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/BEP012212009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905d5e56daf80092adf65a9ea4a2f14be9c15f937c029c2e557eefef9f31866. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BEP012430002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e31cf6d7c476e59f7b453a99a3ef8414bd5730179e65309198a32b1390f919. 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/BEP012430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf41b6f0cd80927819b347f222610ec36281b5287391676eae84b8dc34360c38. 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/BEP012307001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495e791e0b06e054d3ef4db5bec13a22dc9142874e81e26e5c84e2e80935cca. 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/BEP012212006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f4e785681c57323a54834ceffa7372205b352420b4e54305f4944aa8c449f0. 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/BEP012210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180c403691cc794f064491f0805835d8f2e6d07a490c37b03b7753964517100. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BEP012210002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa459bd87109fb883a11a7ffc3249f10a6d4588eae846a1e0571f9992a970e84d. 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/BEP012210003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f416ed8f0aadab8c9cf897bcf279041138fce9da0950bbcfd273472e249764. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BEP012210004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72f31c157d2ba21a5f7763fbb004dbf35b88e4e1b57171ecb46157672b74454. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/BEP012210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a89f477d713ebb425b8398451dfecb6c94ca6eb543b324ce547736084d09524. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEP012210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2fbdba9b56483cac943b5d76010142e17a7aeb4de8eaa1ea858d825781c035. 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/BEP012210007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f4e785681c57323a54834ceffa7372205b352420b4e54305f4944aa8c449f0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BEP012210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2fbdba9b56483cac943b5d76010142e17a7aeb4de8eaa1ea858d825781c035. 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/BEP012210007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292fc21f99d3c7aec502a5e8ce1979392580de6361add2de3b7bd0e325371d22. 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/BEP012100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4554cc439be0e909cb380f29b95d04812586e44da8db4fec37e493fd5c5e246. 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/BEP012031001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df05c4553bd2cf543527471ec6bd4fe6a5bc00fe291dd217f0d9b9fa0f93b6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAEY2053809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d9ae354a84d98fea0db3ce8956edebedc7e03b7b02ad698f8d21507908084. 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/BEP012120001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292cf09a7443338f81241710ad7f68d5c4fda59afa8ad3f81cf785a44d862e88. 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/BEP012120002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefbe722db3e3816516addad5a2a39021b86633a86e80d2c9d1b5fd0b3531f32. 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/BEP012120003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4554cc439be0e909cb380f29b95d04812586e44da8db4fec37e493fd5c5e246. 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/BEP012031001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df05c4553bd2cf543527471ec6bd4fe6a5bc00fe291dd217f0d9b9fa0f93b6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAEY2053809.