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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01ec84f57a78352f89c74fff4cbee1177517c70cc44d3d2f3625530f4f5536b. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39648de7-a3db-4ec4-a58e-4d0432f07ab6.json and https://artists.proofprofile.net/proofs/artist/39648de7-a3db-4ec4-a58e-4d0432f07ab6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a2c92deb933698bf3617c4311ae06dde8e13e3e643b4b046364a587c34d7d9. 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/GXD7G2515995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb07efcae884769d16067f7f007fe43c95b1909b4a06a92f2dbf5c48372ac05c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GXD7G2515293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d0c1f5a7745b98fc03cf91009821c67e1aa4f839090fa9405dbe83360ec4bc. 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/GXD7G2511050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4903b5fbf8b9e0bcdf83e30a9ccdbc9a4728e1cc7e985b8f29005d8014055744. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GXD7G2550079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14511bcedc1ba39878d329412b1131b3e5f8b760b3525758446d8240c4cd8bad. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GXD7G2523594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba82914f7bb1fde106f98c5c7612908ffe65c631998b005e958b41a531d2ee7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXD7G2579997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adda0ee216729c4b8dfb476e2e47c362374d865cf0632fffa6ab3d4cf49476e. 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/GXD7G2563468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225abe9709298c570a9ca80bc65242e933dd0bda28dd0fc186b3b428e87495c. 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/GXD7G2570025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b528c50dee7332c254904d20ab4a3e557d939672c0af69accf1ee14d606a3df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXD7G2521371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2662cd3812bd48062a749c2756bf32586c73c45513185542b718ed30eba076a. 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/GXD7G2590537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545a38052b71e31a41c77ee2f7882487dca3c6413de898485429c432ea3b56eb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXD7G2574578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc5cc3e08f909043fce413e6bef3ebc6624d10b0a43b932bb5914bc25a0728. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXD7G2575058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3321abb59ac959528087eb74d0bdc6f2de49fd07189c515a3d5dbbf07cc4f. 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/GXD7G2527886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cbe74d02db8b09113f702fec2a3369f93eedb28c2242471709be77ecbb14cd. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXD7G2557028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e25576d127641810d4b6cc10a2aa9c74f1488d86d37761f24318166e4d9965. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GXD7G2588514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f744654be619abc2b1fc4266448f171b80f11ee2452f8f77b7fcdeffd0e64. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GXD7G2515636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6df5da93aa17e804243793b9e7f9a8b18b5f50861f460348e19677001e00fb. 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/GXD7G2550074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae26d3da5e281e52f9d40510c901dd461c902b6f35ca61b9c67aafedd144394. 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/GXD7G2543549.