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 0xe2fe71538be34955c0786b951f6176665912f1d08f9f94fbce65ba3d03f1d0dc. 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/4df6c216-32e6-4b19-8767-26fb7d52d932.json and https://artists.proofprofile.net/proofs/artist/4df6c216-32e6-4b19-8767-26fb7d52d932.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 0x043ba0ddfb5346ea8a77b86b1d106573c07cd01153fcdbdb7eb65e17d32ceea7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZS662167028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c4475963366ea339508f23bcd64e1aa5ac2f57bf6fc1e28cb3702d4c2506a3. 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/QZS642171812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9747505bae33ed1cea0615d2ea6e1f9053c0f08c0fa7fd1e442d56129f36c9e4. 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/QZS652163602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aef7cf7a6a3b9fa107e11221904f02bbd6eb808f4afcf791cbafe1314b4756. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZS642124165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d7f4a18ddc162317c290d725ffdf678fcceb13229e8ed26b6ce1d8ea849c38. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:57Z), 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/QZS662194287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0612f2a505d7494d129c503479a582c16db79ac67c02af76130f24194fc1a35. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM42K2242266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a2bdd1448be3515c85bb09ccda502674d485f82ddf2538b49908da1ef42498. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZKDK2252174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4528bd1a0fcf16c4ad5fee29e81e769eb27d28da9c1679ee91b6623f6a6a9072. 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/QZMHL2272537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba492bb395e85eeb8b202daef77f49f1e1687c03344f1035663a5a0f378edbc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:30Z), 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/QM42K2247122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cd79fcf4cfede9ba56aaf45e747826cb09f5dd6ae972ca672c36864229ca6. 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/QZMHN2267162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b9c7266c2548a5f9ef528f3d9d566aac04e9364953a6b09da2fdc85b37f11f. 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/QZS642167646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac8cf770151044580cdbd78707e04d7a56aff755b77b5345f86dea3ae75030b. 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/VNA0M1933613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859fb67b8a55d8311c2c14b30db550f7eb33431731cd14f2774d7ecf1ed78198. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS672253829.