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 0x28459c34c502abb5ff0cd29278ca07eec647d4126c55a31d46773d6eb029a50b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8c7a14b-1c6c-45a6-af89-34c2c8f131ef.json and https://artists.proofprofile.net/proofs/artist/e8c7a14b-1c6c-45a6-af89-34c2c8f131ef.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 0xd144aea5487f3a43a883a11f561ac16c154cc74b48b66f42ee1cde2e8cc88a6a. 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/HRA041685259.
Best Of 2014 - Tamburaški Hitovi (Zapjevajmo Onu Našu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071c7d74af780b36db08ddde01bd831436ff672bbf29610ccb78873c595a28a6. 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/HRA041477654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa459595d19f944d6830146d96dd1e7b5a0b2d7de81d76ca440d8e51258772ae9. 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/HRA041477561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04d8954953dc7f71585104aa433289fa63353a2d8ddd3599cece5977da3432. 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/HRA041475692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86623cd90cb3c7782dd92f759baf3b2a0a477965728fbe136e5a964967d3ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA041684487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bc2c05f942a49a96ea9d167b2c7484476e639bccc3b1d62497e25793ac7d14. 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/HRA231600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60badfc8cd2b130b2a30f3625c8165fc07e0647fd84765bc475b6e2747458c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA041684420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5152d1768230e0c47e0a3adca37984425adebd1778fb28acb61bbb748de18f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HRA041684419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cfa5fbdea06bdff36b04a5e37e97a5d9a9bc6c50bf0f160ac0ec82ab60f03c. 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/HRA041684395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31f74f53430c2b149d4b805f10c65624a55366ee43b5388ad9d3f18fe5f229. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HRA041477837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27f61d66c00ea0582d6cba4ba4908314aa7477e78416bd5ca27f7fe52f2342. 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/HRA041477466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed09a0e5e76d3baa9a205b994a059d63a538bd27b154515d3f884049958c0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040636047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b19bdc895bf31a3503398b5a926aadecd0434169cc2eb4099b86a917fa2595. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040633248.
11. Glazbeni Festival Šokačke Pisme 2016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f46d96af92c15f4b410f03110627aa1b44d9ea1af0d0e2e6ba5c2d709bf6ce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA041786994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6bb49e7151308e5ac73d5bb5b87bd29f6930f26b698a40427ab443c5aeebc0. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HRA041787094.
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 0x4aa16f36b910534d80bd63af5ba14f7ee3a6dd7b6f070f52cc386b18b476a256. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HRA041684867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b9e73e01f83706ccf633e5b87b1acadbee73be58422825c17e94a4c3b2407c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HRA041787095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57141dcd6663e15a613e365db3990b89b445082820a8ef077fb866bbc5f68891. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HRA041787096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0a1776550c52cc4e639a68d0599096ce96f2685e82948454d6b4ea3708ffd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HRA041787097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b8eed187017830fa170d8903a6fe95153b634edfa50e100fa00d5d1601207. 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/HRA041370829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb385b31edf7a6bc3e80b8fcef60859d9002b05bf6bc6f36d71f31792e85102b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA041268086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4903cf7dc7afbc8194d7d7d7b5624c2399b4e51b87241d8f41767be0272122. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA041374911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0862dfefe7e6cbaef65c65cf8eeee0649c3d1fce80f5abfa75cc176b6ad89b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HRA041374906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33897e849a0ecebf8246e6e6850ca64aa2910d997decfe8c0eaa1670620cabd0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HRA041374908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eb3f2b4fc4fe68b958a69d2e4ea397fe82d64b3324dbd803c957a3d934ba33. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HRA041374424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a621dff4d3ea26f1d3ddc99463c7f8c74c72f9c70f058c4a1a7f5dbd895186f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HRA041374910.
20. glazbeni festival “Šokačke pisme” Županja 2025
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3ccabe34299ba9aa900b0a3b8bff02f7ce0c846f0f63992f1d99b737f0b6b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA042500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f407a96c45d3ce3d2359c4f4e8f614ffdbdd03a9d077bdb4ba5cb7f0619f9b0. 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/HRA042500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9abe11d3949ddb24de17d57b6cb6868e53822c32d3bab1108e03be96375bb5. 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/HRA042500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1023cdf3f79effd54414e85463edfb793f6c81e211d4b43016305acae16100d. 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/HRA041370824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6522a0eb193c15bdedc66bb5eed864594cbbede7a671407c18676429bcead6c1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA041370843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05c37f750385f9ae17e4404dd40363e68f23cc09772ceaa1945bc504ac1bc4. 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/HRB901705378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d243c72d6bc89b693680c00c415c8fea240966ef65663f1f4714b105e5423. 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/HRA231700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fda729b251150ac8ce37da8d763328e70b4e9110de77ccb195e412f76da52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HRA041374129.
16. Glazbeni Festival Šokačke Pisme, Županja 2021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80355793d52e7aa22fcedcbb8535336d89b6333c6a7c6fe103b15258722d2e47. 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/HRA642100416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb182e296b53306652ad6010918487a9cf11d45ba5dcc03d83fd93110d4eb8c16. 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/HRA041581201.
Šokačke Pisme (17.Glazbeni Festival Županja 2022.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69c0ae35e3dcaed7a9b763afeef47d98535903b8d972aa9c73440a3ecedb41f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA042201143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31f74f53430c2b149d4b805f10c65624a55366ee43b5388ad9d3f18fe5f229. 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/HRA041477837.
Pjesme Podravine I Podravlja - Pitomača 2016 (Večer Popularnih Tamburaških Pjesama)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb93368888dddba182569c9969c6aabdb3ff6bfbccd9a28bdaae442caed6453. 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/HRA041374905.