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 0xff5442d2525f19d678c183f9876f0dfda1af27e7a4dc0e3e6521c2f81d4c8f92. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/225e8153-4cfa-4ce8-869f-8706a52c2d54.json and https://artists.proofprofile.net/proofs/artist/225e8153-4cfa-4ce8-869f-8706a52c2d54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dalmatinska Šansona (Nove Skladbe 1998-2001)
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 0xa9651f35db57f8afaf0da49caa64debaf0bc8b94b519d7547b4c12af68f69611. 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/HRA260201407.
Festival Zabavne Glazbe Split '88 - Veče Zabavnih Melodija
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b6bf39e97c8879a8ef27198ff00eff24da1e2700ea967463929819660a6057. 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/HRA048816754.
100 Originalnih Pjesama - Splitski Festival - Ništa Kontra Splita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad3df801862f3acad63fca051276fd4faffdf9bb3dfd4700e0d52366f5608a9. 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/HRB901400929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2bcf560847aa88b3b6c4b03eb72b774eeabba320a298e0fec1f7fde23c24d. 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/HRB901400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa94b85a42e6b30713c67c6dff50ea74f5f49d292bfa2d2f9d567db64b7ab0. 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/HRB901400933.
Glazbeni Festival Stepinčeva Katedrala '91
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576760fdf672e9d96b953881b1b8c805b04291109f40a589eb56c51dc5c41cd8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HRA049125738.
50 Originalnih Pjesama: Moja Domovina - Najljepše Domoljubne Pjesme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacba0c76d74a99fe0bdaf53679264a89e16a0c0731410644a017d4d8662fc7a9. 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/HRA049125849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34746e4c6f804960101871b99359be7a61ed4df92feb8774d4a3ec1cd5b1cfb0. 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/HRA040642433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5e3657d49cf1928d057b5828cd3856299367ac91e56117639205bcb7cefc6. 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/HRA040643729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfdd6f155136e7fd2e8bf28a23c60eee15f35da52b64ac3769ffba579fe212e. 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/HRA040517826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5587adae78ed3e3dfacb9d3f67fab74c9931d892badc8e51d5f0816d535c2b69. 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/HRA048919121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb747a1966039a2a36e7c86b0dfb94810f6b0ec733d39250cf52bef767b5e20. 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/HRA040618283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682efd0034ad5c06d3cbb21b84adc24c91207af781a7b2c5f824f88bd49405e. 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/HRA040914159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f040e9d9a46f758ba94ac1512dc55c9ef57df011658de080e8bffc4723b2db6. 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/HRA260607807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ce292ceed135e2306b10b1cb2eb7303a1c860bd08ecca08145fa4d521883cf. 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/HRA040630340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc1c389a6baa17a8e2896ab2fae3430e788b1d419b3a854c16e6fc104b97ac8. 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/HRA041889100.