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 0x8dcf53df08d7f31aa788935d3102ed07c8fdceb231795d6162c851b5323994ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8debf105-d285-4767-9eaa-11ef057997b4.json and https://artists.proofprofile.net/proofs/artist/8debf105-d285-4767-9eaa-11ef057997b4.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 0x5f8be55b38ad0d0a85ba58864d9d42a94ecf94fa19bd0afa4d1d817f587684df. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/HRA048211270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d5f0f8d96739c5840ebae80cbd696eed553750883a13a7a833e8b0dd842cf. 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/HRA048511273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17e137f5fa0b4137321bfae396d0ec9737ad06915865635ef3a2c82b10e99d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HRA048211268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98551ebbea4315f3dafbe87dc6c250c13df907e81a7c5d6228b9367cd234e96f. 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/HRA048267206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39604ac61a5e7e39144f3c5e16953667878e434c77b832c30049cf081122b8d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/HRA048267209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f081d7d44642628acf5689addaebb1a057441e80f870e2c49b37bf0dfe128b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RSA291700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be0d9372b668fcc562cea621596cfef98fd1d74faad0876f49a16c8b2053f3. 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/RSA291700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7da82866db3972822fe0a8c42e244c5753985c747c1d279c18fdea8a964312f. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/RSA291700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a68051aaf621f0991d7e012908195859845266bcefbc1c5331e3f31d0156e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:51Z), 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/RSA291700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be9f193a59e654811dba59853dbcd10eaacebc80b90bab660766109f5b8cd19. 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/RSA291700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c5e8ca27f97de03350b5443172f76908005df345c754a044d78faf4b8da33b. 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/RSA291700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2094b9fe07809b295a30f08a81b159eddc8093ae1f62168f0f7410dcdbe6c66. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/RSA291700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a2e181994bbeb18bdbcccf6424b129aaa63b29e4e4556e40cffd24c78f679. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/RSA291700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6760f87e088cf18e3ebb8030b0771edfdcf15624459c971be69735e9497791. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:32:57Z), 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/RSA291700077.
Electronic Jugoton - Synthetic Music From Yugoslavia 1964-1989
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d5f0f8d96739c5840ebae80cbd696eed553750883a13a7a833e8b0dd842cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HRA048511273.
Zoran Simjanović - Pesme Iz Filmova - Pop & Rock 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbb8bdf2fd5e76ba999929aa76cf14fb619d87d20a368be20969ea433bf3342. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/RSA141302201.
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