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 0xbf16e67a9d391e099ff25e40514a0d54d701479a54fe41bff7f878a0ddd0ddae. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f248df29-9fca-4998-bda8-f6851fffd47d.json and https://artists.proofprofile.net/proofs/artist/f248df29-9fca-4998-bda8-f6851fffd47d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
58. Festival Dalmatinskih Klapa Omiš 2024. Nove Skladbe (Live)
50 Originalnih Pjesama - Šibenski Festival: Dalmatinske Šansone 1998. - 2016.
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 0x1714f8209107df1b149e773a152c6e30a1cb14e62086bfc9ae75d2409bc3dfbe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HRA231600023.
Dalmacija Piva: Festival Klapa Uz Mandoline I Gitare
Festival Klapa I Mandolina (Opatija 2013)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a811fb9e565e328323afde8bf8f06697e5cf6e31b0e7947a083f0d7e964b3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HRA041476649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa665033b7724aeb0b8c5c06e9db4402e6181b476fee8d2bda5be5fd371de339f. 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/HRA041476861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357beac02337fe36e18ff4e4723d007be34e4cf14520613560ffac2ce7a92680. 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/HRA802109206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bed03697c1abcae24477a15b5e4ef4df2409dbd909e861b2afbbddc29208c0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HRA041582802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaeae1df74bbe99dfa67b921e2bbfcc234ce62d2c7f27155fd76ab5aaf5e573. 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/HRA041991123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0637d3ae72bd8c7d38048b42f962f5d7ecd1a0627d73c2c4e7631970e8dd24. 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/HRA041685052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adeeac55d3df6d3f5cbd8700213631882a432c3b7e3273fd6ad9e04de6455e6. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/HRA041991122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeab50a4efb0e096c97ab6618b2750e24a2cad48ca0fd8c80ab83c6a91626153. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HRA262400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee501e6aaa10bea9b7e998c5c2a66c390562073887930403b671dccd1b8734a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HRA262400025.
Najbolje od dalmacije, Vol. 2 (Klape uz mandoline i gitare - tradicionalne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca775f6884a315e1aa4867636a51bf5ff22c40a4a31fa447b787451603b1d7d4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HRAA41300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf719154ca957be5e9e91bf542cecbcf29573c8384b37458a8b4c8ed5d7b47. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HRAA41300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa167c31f0798f04856bb7e1f28d80c1ef4ea16e778fef98790d44f18e9bbcd. 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/HRA261581201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77956174b537e5aba184bef608965fc613edada0b81ec5540b986b0a66741fcb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HRA261930108.
Najbolje Od Dalmacije, Vol.3 (Klape Uz Mandoline I Gitare-Vječne Pjesme)
40 Velikih Hitova - Klapske Pjesme - Samo Moru Virujen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db2a01f42c920ffd4223eb82f67fde5df20744ddc6bbfdfb020635019b5e1a3. 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/HRA040961464.