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 0x949eb03cb2ffcd2b0a1e66794d761c644e2aec6b655173185abca7fadd2a5abe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aa0b094-22c7-47b1-bb27-459b4aa2fd02.json and https://artists.proofprofile.net/proofs/artist/9aa0b094-22c7-47b1-bb27-459b4aa2fd02.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 0x2fb4cb403a5e0f8b1879247598f01bc91e1402cfb49a259787dae2b489ea2db6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXIV82358185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1459c64de48621e4b92105bf9f3e02f4dd929cfacceabd9b3522c2e7599e6148. 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/BXIV82372492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb783a93ef5d25b498b12baf6890f8121f2df1291deb8b64987a8d9f8cb630537. 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/BXIV82307358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457d92a014459e1eefb7c67123e7339c3990ff0971470709cb73a0fcc08de92. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZWFL2382692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870574e577d8b40d564e139962732ce9b1b6760590b0df71e0cba6673dfd2225. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2425515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f0a1f291913162941df07a32be66128b049df708249d2de9c03647888a307. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6F2489310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff1314e1fe0a3027922e724e459c0e7739bff1a58e99d4ade98a9de1e60067f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2470692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d25dc404cb00b70a9d30e55d90a7dcbeee55909ed6cf881c2439752cc993a0. 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/QZNWS2405506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494c301f33640242cd90c6a037ad532fb398d95b8e65a05008cb9da211c2a301. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:17Z), 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/QZWFU2488446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0ff5b836ab379a3cae37c96e6fbf807bb2acdbf7d65118b4d68f18af9058b3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:57:46Z), 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/QZZ7V2477839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2bde569fa5f165c654f80a76696d9c85b507d04f2653c837ee23edb959a87. 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/QZFZ62507777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb5f4e6fa760e3eb9cf8e7b2a4214de3567e78a9d0b8e0b6f71216d205d49d0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BKTKU2500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844cd43d02bf2cdcc48baa63d7b2b5b76ccb14b2bfec958fe4573d03b72700d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKTKU2500347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648dcddf7dd14e5be8be1c4862f8c377bb136f0b7dce64962557cf84434da464. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:38Z), 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/BKTKU2500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301f59789e8d546c2cd70bcfc8d8f3fa285b0e7a55b01b6718bc1314360f8313. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BKTKU2500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48fa4ad996593ab419627c13682283de60c6cfd4b5b7ac7a9fc84d6af890bc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:16Z), 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/BKTKU2500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd0f9c91e1afd134934634a0346c0657852d89d974b4c3751f54a7d133ffe3. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:42Z), 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/BKTKU2500667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f9a119e3c57212fb1186cf938cde9a8b01f73313dba60f398caad4b1648443. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BKTKU2500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafbb7238238995dc73edb8695b845736358e862f09bc8d778777118f94703f9. 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/QZTBF2413609.