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 0x801bdcc7261640d70376453d96afc68ff79d2dfa7ab8e7fa300f55375fb1af57. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5176c529-f1b3-4718-9657-0c7c865e76cf.json and https://artists.proofprofile.net/proofs/artist/5176c529-f1b3-4718-9657-0c7c865e76cf.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 0x7805df40e7c69c74f83e0c0b3f308a0032ce133cc128d8eeed53d537b230c9e0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/HRA040040536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a46e967d2e9c0a95f597daa36c953403d50e40f97de447b8eeb5c5c2c46aab. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/HRA040142082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6d59c9fd2f1937568500cd94cf8d9e4c0f0fa6e81f278687a13f407c2619d0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:45:30Z), 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/HRA040142084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70670ace513c5b5528ea5de071c42946ec7658f724a43224e1125745f4cfa862. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/HRA040243420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1090c9dcf6b1b05793f4e1331e771c49185dec3cd5f79251640e268fe5888823. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/HRA231200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdeaebff479febd284965395f9ec5db8dc43fa12a4a7a8364fdd4fb1e980931. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/HRA231200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e7ff87237e0bf1668e6e7ff48a48595fac09e21ff5b4963e87b2f9808020d6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:10Z), 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/HRA231200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff06ad8675f6ef66da7a7ce1d067045d7a8f479da069fb77eefe78bb174fb39b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:34Z), 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/HRA040040527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aaa25597885236cf57835674a2561797171b050130d804c07c705ca9d5b746. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HRA040040540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe281e466956632d0c513e8c2de257c0c67dadeb8ca31b92912fc772fb89ba880. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HRA040040537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ca9b623ad894267030fd0291d61bed05daa75984e0fa7440b48ec3fbf4499. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:20Z), 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/HRA040040538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea770799744556d7da40f5f1da36f9e4d2c08bbd830d1d40710d0ac9122ae66. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/HRA040040535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312fbb6042816eb0a797c8a6ce7b3cf353c4b5ae825ce6a2e48d2bed90684e2e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HRA040142083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6d59c9fd2f1937568500cd94cf8d9e4c0f0fa6e81f278687a13f407c2619d0. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/HRA040142084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cbf8aed67630b34aab81a243b9a0c88e8a71b2d8265ed68629db691ddcbeeb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:24:36Z), 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/HRA040243424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcac57e4868ca98ed2792e43468c5d4912a3a132356f28f6db7c87d48a6295e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HRA040243425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada59ef5024406fec1600124326ae0ed0096294552cee24caf141a3c99398240. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HRA040243429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea770799744556d7da40f5f1da36f9e4d2c08bbd830d1d40710d0ac9122ae66. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/HRA040040535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe48fdd2300b48b4c604362edd1e36a1f1f07c6ea8cc8fc205ac3ad90239d6. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:43:19Z), 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/HRA231000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd803439f7827b7175bb285c6e0b961b36b4df5d41a121c935857e54200f50a67. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HRA231200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4733a27cdba676f3b658b1fb9256505376a6ad97ce7d38098584b70422468d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HRA231200148.
Naša velika pjesmarica / The Great Yugoslav Songbook
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3be9d01b233ebf0b7c07b0038b57b6bb5eeb8aef96801896ade7d1670882360. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HRA232200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e78dfa3a6cbe06027d6d1a812b184fdf71487f08c1158f79df57b8edc5f56f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HRA792508408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958f1350eb56762f20ead2ba7135deb7fe74fd2c5be9a377326eb210291da78d. 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/HRA792508403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e137267b26deca0aec92576ad5dd260b8507d21ac6f90e5e14ea2b6fe70fa17. 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/HRA792508401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13427932c2228f7f046d47b309011cf215fd5bb14b7f1110c7a2b6266ee20f2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/HRA792508404.