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 0x7a65ecfa6c322f01bdc68e7f19eb017c9d41187eecfd71c04348befbca0e95df. 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/aebbfbd5-e760-40e7-a8ba-03092fdf0176.json and https://artists.proofprofile.net/proofs/artist/aebbfbd5-e760-40e7-a8ba-03092fdf0176.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 0x2f97d19f40652dd159cc17df6c9f9154469306e3bb06d618cdea90029048c40b. 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/QM24S1702955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7a1d47f9d413092c0cf0b009eff8db84f6fcd2b703a0f06e9a1e789fade99d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2030684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ac5b2b5f7b4e134c75facf2db1274f7d88df9e7fbae3430f0d3e280771f32. 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/USA2P2114388.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7b164c16e7a5c56e25fb3ee0a7f6c9696c6d291e0a0b3c9d70e1a11ad2068. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USA2P2227080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd0c53ed208016a9a0ca010bd0533fa31c86673d765f8588136b0de340e3bcf. 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/USA2P2231799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a2d1e42f28ea5add702bad8cf157cadfeb29ce4b1e5cc2f84e76fbad436359. 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/USA2P2232929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf917d27af870395dc3f554ee61eb70c422c751e41387851845f4c19c8fdee174. 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/USA2P2232931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7b5485d27b650a7b00e1115d9bb00c0ef40edfdbf3e337f48f7f3dcc568403. 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/USA2P2206570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fb1fac77661da5ec1771d3232bb958093ee09a5bc3216b1a79e8603357a644. 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/USA2P2160224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02116fbe5a03df18f925cf644e22257100685908ddd2c258441fd73a5e32e982. 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/USA2P2205142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b315e71deb90630b2586a848284e00f3cc5b0cc195c931e6df553f09d3a930d. 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/USA2P2206571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945ebbe7f0b61ba3a2205174bc505ce643364b87eb0ee6c985ba29664d39362. 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/USA2P2206572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f4bf63929227e13c54ed7bc0d438ac92c1b53dd3c3160be0726ca3cc6ae19. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA2P2206573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef4efabdc41c3094260d5a149dee19fc591f8f4cb215e52976b06840635623. 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/GBWUL2330054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74455de01d3fd52c5735b66f800ee199d33df405f186248f67f1aa2e404e30e1. 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/QM24S2300654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e650c6cb64861e3cdefc13dbcc8691ed78f495e792f2a9c02ee2b1ff905064. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2302847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3170ae3349b4fb3fd48a9d4ec68b8f5bc87d9710053f38cf63210bc95a03f6. 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/USA2P2303510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30cd6ba56abe07a989252598b5af33dcbeddf9ffb4ac559f0f850eee3dbd6d. 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/USA2P2251661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd0c53ed208016a9a0ca010bd0533fa31c86673d765f8588136b0de340e3bcf. 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/USA2P2231799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7b164c16e7a5c56e25fb3ee0a7f6c9696c6d291e0a0b3c9d70e1a11ad2068. 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/USA2P2227080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02116fbe5a03df18f925cf644e22257100685908ddd2c258441fd73a5e32e982. 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/USA2P2205142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fb1fac77661da5ec1771d3232bb958093ee09a5bc3216b1a79e8603357a644. 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/USA2P2160224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbfbf70d50b5c23f6d8028daede9ac88f5116a7843a689d43f68b0d4b9ffee. 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/GBKPL2159272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0730fb166be6f2bf30bbe7441907ef7b8609617c2fdc722b2d2c2bda8a5be48. 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/TCAFP2137562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda59575447178954fe61277f5835a3ce41121eb58d4900108939f537750865b. 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/QMEZE1941912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf32d990ccdf656208573dff6a89b9df95dc2a650c1f404e527a4fb4aaa67fc. 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/USAT22100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496cd2657426a922fc42f5faf68e9fa1f97934e9b02ca1ad707cd02f188fbeea. 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/USLD91729260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87642a37e8662e48dac59fe1eba3d73da17d7b46e79775089814ec12c9ba4cf7. 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/QM24S1809276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071f4d24fa946162fa0dfd80540f22b63f092cecc032879580bc56bd9447c7f. 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/UK9951802804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee563a91b5a0015135ee798d08049f968b828fb1dddbed6d702d421added2e5. 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/AUUM71801079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74931dcf8e38d68d5e713972a82efcc3b814a5b67d1f46e6f7ae2a8715fb1d21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92095209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ac5b2b5f7b4e134c75facf2db1274f7d88df9e7fbae3430f0d3e280771f32. 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/USA2P2114388.