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 0xcd1d0a84ed4e61b6c59f61cc7aa1cda1051afc9ec3cdc7519ca8c3f381f67da1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a64ba63-3ee1-4c69-954a-450667f6837c.json and https://artists.proofprofile.net/proofs/artist/9a64ba63-3ee1-4c69-954a-450667f6837c.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 0x67fa33dda8d69f2b8dbfc5d7068c40f561631d7f75a1996104e66b206b6760c5. 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/CH6540822816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8a72ec5231c9298900b34fb036df92a50e199c45508e83931938bc8e06bd0f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6540822817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0043bb2224329671df3329d96fa2dbd06f6b060877d9e050ee7e944e1522ec52. 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/CH6540822818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02913b540232e77d6d74a78241a8227caf751a042fbb0a224c3f461d957222e4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH6540822823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94079b6ef99a2a00e9df51a312bd912b860f20ce145324af10ad335492270a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CH6540821990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d92edee0f681e53c62d83ba692b268694e9944b8a62ea5610720ff3f687a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6540821354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3853ff9de1d1e692d21df02438163348650fa0ee1e3657b4fa410398578a9cc7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH6540819784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba70e288b8b7ee86d478064457d6cb3fa535257e64b538b2f8e80ff387b4fd2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6540819792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaae19474056f923dc03cdd574cfc31000eafd9c1d5d8d08890919ebccc6520. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:51:42Z), 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/CH6540819793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9cce2466143cfc0879cf246efe7ce1bde0850920bd99188d90ca9a8573acae. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/CH6540819759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2b910e24169e48f3b0fb47ceecf142d2cea950a0960caa5bc7f7fe8a4d8899. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:52:35Z), 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/CH6540819760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeb8af2951c26d95c69c9d81d45a8a57f15a8173fe83d659d53838ead2f6f1f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6540819761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559bcb4f384cd9a488b050487ba65013f6790d1656081e1f3098a945eb197d07. 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/CH6540819762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f243a2164a55b725d2af1f1baefb628491eebf53424a4dd520a3de93cebd9. 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/CH6540819763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53606f50815f3d3b48ec30e102c0c66e98cece6e3e631e81d1336011532fed8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6540819768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4d2f89384081c2a34cec8a2b455d0cef3a13add3d96371144f32d7f04b0d30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH6540819773.