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 0x9f2fc33aec1a956facf84db18505cb2e1177d0034c8115918c5ac971551d1988. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cef6dfc-4303-45fc-afe5-97ea9c1dd55e.json and https://artists.proofprofile.net/proofs/artist/9cef6dfc-4303-45fc-afe5-97ea9c1dd55e.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 0x0b14009a6e7cea53eda73d27745fed04b487ebf80d8ef20609df336cb603f917. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:10Z), 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/TCAJD2442187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7372b62060f1f428fb5b96c8a2f772b981d861b9d18c9e14569447750ffd65a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:13Z), 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/TCAJC2442292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc75e53cb720c1703b1c5688c558013427aeb9577dd6ad1679eabe05f4a8246. 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/TCAJC2442142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3828f45dd1b6d9167ae03f20b418298b01096aeb61e9ee8868531cff1e0a2c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:29Z), 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/TCAJC2442119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b373a53dc0d784b99f9f895a774a8108178b9904c2e6f4c799329777543213. 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/TCAJC2442347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf036cef5d704929e74acc16b6c4530fccc7e26c656be01db6d0ff4eebeff8744. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJD2442329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0757150f9099602bc3c901e42fa01009010541a463a0105487aa057b03aad43. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAJC2442231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc94cfc2e56c61d70641901735cce8b86834e16cce87d92d5c03712061ae570. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:12Z), 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/TCAJC2442206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565fe257b7e15dca5ccfe40611c8cccf6db2e41ba9335875c1b4ba5f153afc3e. 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/TCAJD2472860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35588386643b660e327a5feb8c2908c8adc4cf6bbd3a73746e76105fb6d3f5af. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJC2472795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c83fbe61862d070ffa27d51b4ae7e8804b313a326e42de9c6b0655959a1ac. 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/TCAJC2472884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5567e8061d762e0dd6366b9cda51391ffdcd9f76144d23a86cb044cdd7452bf0. 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/TCAJD2472770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9263aa61d5052d9cef906beafb2b7967f4dcaddca875cc77aca911731ca274e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:19Z), 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/TCAJC2472824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82b7b9a6560d887cb348e70493887731d5d4f3641302c3ead561105fc0463f. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAJC2497503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5b44321a3dafddf7b4b055736ab8f346ed121cf12c2f954198a8263c4cf418. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:55Z), 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/TCAJD2497564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb386347aa63abdbddb8c69297186b70551b2f326c8222109a6311e3395de82c2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:36:58Z), 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/TCAJC2497540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b2a2c22b3408852ac78330914e03b14845f5516457f956d03ea4a2a2edb6f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:46Z), 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/TCAJC2497603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a50b12a30666869ed4b21eedef189aa7c6d6a5e46a9638f256462da88068886. 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/TCAJD2497616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfea741312aeeea77a7fba0ccaac52fddfabb80be5eec5e52ddab6b207c33b6. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:41:22Z), 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/TCAJC2497518.