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 0x2c8214f4369e83642884183a2d721ba2e5fb89f21024c2e554bc7420b0e2f51b. 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/18fcdaf3-f58f-45e1-a3d8-08a7ceb93b6e.json and https://artists.proofprofile.net/proofs/artist/18fcdaf3-f58f-45e1-a3d8-08a7ceb93b6e.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 0x27a9d6df0ee729839f64aa9dfd4cc771b726c3215f4a541ce848b2ca82171a9e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:42:19Z), 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/GX89G2560343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569461c21859009ac46b0280d6e672c4e6fe9ca11312ea4653d016ebe0855750. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:41Z), 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/GX89G2545955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78976ca41578e43f158f2ad5ed84802da958694a4c15f705f61d680a71dd8612. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJQ2557189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1437954cc301da53c3c2ec890e53fbc119c6ec8320f93a09c2b9683605b62d. 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/TCAJP2557210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce60fba8dbcac3435a76a4979d04793ebf5e354c19474964cdb4fa13f67a20c. 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/TCAJP2557241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdcc107e904d1c96b838a76834ad101ef7dc070449fd35ae686d8c3d389f03a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:56:29Z), 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/TCAJP2557248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822e93669f67f68f56d825969e4cd319c4140ecde4b8d79520e254ac1427bea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJP2557255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff65d2fb228619cd45354065cd0c6860f51dd53d11a03acd49fc2aed5bc7f48. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJP2557286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35a54de60874634616fdc3366c243e3264bba29b81a5acb13d0032d647e443b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJP2557292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71feb8e4912c6f2f0844d3ab89ef0fc5a2045cdea34d884f02170f3dc7e7ab8f. 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/TCAJP2557311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697dccdb20193294b5ee6f327ca8ef1679114aa0950fb4eb03af3ddab7fecd4d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJP2557320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96dc8a13affa694a3a77bc24a444dfef4bc39e4d71f381cd1aa44e76b565080. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJQ2557329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3352e9a4beb0cd1ae08ca27efae520da536ade21f3b33d51a9d4fa12946f20. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:23Z), 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/TCAJP2557367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214def2f41e1b63330971a2590150e9cf4017763b656474abd01b124930aed34. 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/TCAJP2557373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de39b07ae87c5fba7c74b9b0058159613c62694d94c0240999ee8f51b34c91f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:33Z), 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/TCAJP2557382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2e8509401eacd2b0b305e94dda5de5ffa437b0c604dae7a3880f0378506a9e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJP2557389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752acad47a0fa278e3e821b607f94f8cdd2ca98da98b7aced1073a204c4bd71. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:36Z), 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/QT65Y2563757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e85b1e3dbb32c41cd63950de087a4cb0a756cc7d942e05afc22a345363fb341. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT65Y2563836.
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