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 0x9cb63ed0198193a8b3a3607881ec5f739370747904f268cd2ff47251e7d5a7fe. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3721803-e5e0-4239-ae4e-93a9d23e5b0b.json and https://artists.proofprofile.net/proofs/artist/e3721803-e5e0-4239-ae4e-93a9d23e5b0b.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 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 0xb1dd292822332614cf8ef507ca366030e8aac76b72d42404a7041647f76ef3a5. 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/HRA260913804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8686ae1921adee4fdc36f7cc540818aafa28a5ceeb6b573e3751aeab8f33c116. 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/HRA260913703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd25052e851cb56485c6220ae0028c732fe65180f00efbf58a2d94aa03b33c. 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/HRA260913807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa061ddfb4a36a045d48aef52b1c0c0eaa29755dec7a77c0067717154e18a174. 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/HRA260710430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0b64faa44a5f1f810e4d6f711397e3f4cd6e809beedc248a7c3918bb2f6b1f. 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/HRA260710436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0061ed77bf4512142a50a11e63e0433046bd3f9a31131462e5c96d506fb584. 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/HRA261381501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef6fa8eb07bca9b80f7b05df4e9eea5350d2958db58d9d987241601d3b4406. 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/HRA110409318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5288a54f59cf2ca0735a25f6865b7bf63b80a8a8f19497cb66cf0e50e6cae8. 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/HRA048884084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78935afd1a9b37ce0219e4646515d54c66826681710f1bc5268f9af25b3fbf1d. 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/HRA041165375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c8b3e962388deaac0151a15b854bb2a0a0d013367049ea6ad95c599046c1f. 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/HRA041266383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0092bcb7a6d9a2eca56d710abe50fd46e15145942570d0b999b03d8feaca47e8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:05Z), 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/HRA041269222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e032ceeb3252fae22639ccc6e275c9c79033c0a1a78650bdbc215178a8eabb7. 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/HRA041269224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03568ed783db500ea6d54279011ad837f05c3d629714df1636c38aca0c58b5. 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/HRA041269229.
O Ljubavi Klapa Piva Iii- Dobra Večer Uzorita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e5c83e5536575ad0519eceea965674e6c8724d54921ebc42c9ba0ae990dd1. 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/HRA040641471.
Brodfest - 15 Godina S Vama - Domovini S Ljubavlju
Brodfest 2001., Revija Domoljubne Pjesme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45586465d5cc0b8d590b52f263373092947470599df8f4ff52c08ffd7f21849d. 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/HRA049735733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2c7032bade93337655802d2f4a8218c0d706cbe8ee93debe62323325a89abd. 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/HRA049735736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc677eb180abfde8b04d3c3d0bf90f099d397897892aca65d905e3834832ee9b6. 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/HRA049735732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8640f2ae103dbfdd317310cd20e3a565b2a73da676554ad2b61a9ae6258507e0. 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/HRA040218936.