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 0xc89a596ca9a0f3e07e0f5d29d245fd5d986504d68ccb233c39553ac6d340c2be. 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/c37b9aa2-4892-4a2b-aa0b-6245a163d4fb.json and https://artists.proofprofile.net/proofs/artist/c37b9aa2-4892-4a2b-aa0b-6245a163d4fb.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 0x9a5cb205a33c399afc112318b915aa43fdfbcd9222e11ed90379f7f71c6b4b56. 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/QZMEQ2357330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf1e3f73c168cd2ef5db9e6b5e03ae1bac99c59135ca3b2b65b72cee14613db. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN42307275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46368dc460121688cf916500578e4ed97881a44992e5715f2ea6bdd582bebcd2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZMEQ2357331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6a5f0902d772b7aaaa25a58e9298dd439224e1294b980c1fa44df1193f785. 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/QZMEQ2357332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03f9de3a9c742648b457b75b432c2164b1207df0ff2bc79daa7e8726b5ec8ea. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:40Z), 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/QZMEQ2357333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d98ae2c3a54dcb53f68f148d6fda3a231d50a1d66ce42442c10bda84368ba4. 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/QZMEQ2357334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308be2860248713fcbe262d214ac478d7b9b43bf4e12cf742e7c5e3fa8723e45. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2357335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f2ede8dbbf0320e65e65ee002577704e13589fa4afe99f035d2c903eb0d63. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2357336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829836f55b8d5777a7558fb1ad9fca5d27314b57c1e78d38a10521acaaf1423f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2357337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737176c74bfd386e7e46f4d9a4f2af2cf75f38590bb22833ee5fd33cc40d6c6c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2357338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b413e7bf7305cebe3bd2c19978357f95189616092a1d786548314d845e136. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:41Z), 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/QZMEQ2357339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c7dfb803fe1e2b46b42838e9c0f457d3adef27953fa77205b9d50e4293614. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:54Z), 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/QZMEQ2357340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abac4fbddc9a657c9035132c544365b9c1a5b67b1132439216d2bea230df4a5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEQ2357341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c22932a31e9179c5927f262a173a0c6df546f0eac580c45048b2bb0e93f7f5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2357342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd772dc9148d793a07d2ebfb09efe0267069b10507eddc7da7eb141a9ff5fe666. 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/QZMEQ2357343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44253086ca49ff2b7b38a3597303f45b71b4e0ff35ac249fe341cb421987048d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZMEQ2357344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a69aef20b91b0a7a3dbe9fc68954b1ef692c2dbf2df60c58158f32d5ba2e41. 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/QZMEQ2357345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03d652db411837e5ff249db926ac3cd7b8a1b07ad0395b1982e01c99d3c502. 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/QZMEQ2357346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10b7dc3af9fdf0ebddc300cf2d238349201da1902f11b18d3fcadc43657306. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:04:11Z), 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/QZMEQ2357347.