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 0x125555327425b47bb1c3d091696fe422589a956e487c6c858495364a26235104. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23900058-b187-400b-8d96-d6f2349a1fcb.json and https://artists.proofprofile.net/proofs/artist/23900058-b187-400b-8d96-d6f2349a1fcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ambrose Dance Band (1930 - 1940), Vol. 1
Ambrose Dance Band (1930 - 1940), Vol. 2
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 0x55ad214bfd2932911a61eb301dc5c0d197bafd52dd4d62570d725e74130b402d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GRHR11271702.
Fabulous British Dance Bands: Bert Ambrose - From the Depression Years to the Second World War (Recordings 1931-1942)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de797544a1dd86380eae4932ecc1e79afdca258c2e7235860cfc3df194c5951. 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/DEL111301149.
Whoopee!: A Girl Friend of a Boy Friend of Mine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8838a51edd197b6ae1df46c4a16e6610c386b69bd18dcf9686eb74dd0ee9b5f6. 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/DEL111301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd265074bb0db91e40a91f1fd4e652f81332dbdf31ed501f84d72f48719f66563. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEL111301151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc517816a30b8bc097aa90be15a95864d201d61184da2f3b0085cb1d4b40d57e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEL111301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6d2d4f9f0f8bca00c460f3a77b18aad73b05c20e38652dbb916ae16917129. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEL111301154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd93f2d60f9f0e1ab25e73d1f23a717f633c5f566e7f25dd594084e8b521da7. 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/DEL111301155.
The Big Broadcast of 1938: Here lies love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b279e62d2c7bc4fd61b8226b2ff6058a3a1a74c7c1b2ab2fd8b6b4e66b4ead. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEL111301156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3dd73f7910a572666517d1fc29fd5443bdd3cac3cba78f973aba36bab0bc88. 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/DEL111301158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e57a4d0c9344e9927034b32292b8eea63c33b7cbd5ac783a081aa5b6675bd2. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEL111301159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc483c2644d0301b946989f7891c504a9cdcc305692330f9c8f477427efdadff. 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/DEL111301160.
Broadway Melody of 1936: You are my lucky star
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b717d898eef5e6d37541717aedc686202a4b366ece08fe374349a8547fb561. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEL111301163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c2cbb6a7bb2322cbb8065264c0d82922bcf86a7bb07c1b4ea8cc27b26da85b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEL111301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d283d32139d20ed9ee3c581618a518f1de9cd47f20630d727f1e7b3349e1f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEL111301168.
We're Going to Hang out the Washing on the Siegfried Line
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5fcdb88540c11128bdc9b62db31445ad9533a9f57006d594bc86e69035ad65. 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/DEL111301169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61421fefcf6a6e3c3735d985c04d476003dbee8e93c35b9a537ed1e2d79b7f. 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/DEL111301170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c1a54c2a8ba7d3e0afede4c7414972802ddf2117bc4a361e68bdc233ab543d. 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/DEL111301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9252d67184d7f16e8bd477bc1800ce340fb1795f5a4f2108a72370c4dcab1448. 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/DEL111301172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc3e899c0fc48d117fc87419c3391b2d98d8bb7fff2682f9ff634c5555c1fe. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBAVQ2300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae3fedbabe52dbb630ba86f6f7e47a50260cc07a54c4ce5cd5787eec3984285. 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/HKI190145202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d413b8f15db6152faa0cc000fab75cabbb9d9763e7ddd6add0ef7c6f4f889ca. 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/HKI190145203.