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 0x714e249753971a9d64ecb9ff2ec857ea50636cb8853159e978936da2d7bf540e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6935514a-6573-4025-846f-32c608fe9bb5.json and https://artists.proofprofile.net/proofs/artist/6935514a-6573-4025-846f-32c608fe9bb5.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 0xdc0f2e336e7d88d60f34d8d6ca91ce50af1bc48545d27044b73b074710ee093e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USKSV1602901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9403c8962102a7f4c4f603398beb58b6193116414f3d6f78cdacf9a78d4407dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USKSV1602902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41dd62b6ac6f6acafe9073ead0ce16aa4a880088d15eed87173c949634635d4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USKSV1602903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a144c893d5be95ac508291df48a75b556c0d9a21122e5139a927ec85883d385. 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/USKSV1602904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae547ee29d5dbb20c6f896125ea7358696a95aac574a474cd6c89a1658d9e95. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USKSV1602905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49676f547a4c9a8012df258b3dfa775f089b290d26ac03f7e78e085b7bb1e866. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHTV1010160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcee0b379ebc5777ad7a3ca24629f2808a517068a5dd19b36bf525933b8e50b. 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/USHTV1010161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b8566d6bfa2430cf2c6c5bc5a0f36f9d97be3c0ccc6743343fe3d14e97ce8. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USB4U1314905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8f1bd0848c563ea6b39fff4cec474d1899bdd1bd7925ca6c37748e05372d4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USB4U1314906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e554a3dbc597b50913013cd5cd92e7be7c1fde370efcefb5fdeaa5a7558b383. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USB4U1314907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be9f0272917e17d93fdc78b9e513b983a5098f8b47fa0f281a62636a9a63fb9. 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/USB4U1314908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f222309af17ebfa4e452485985cca5e157625538f31c97ef760c4a9f012ba54. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USB4U1314909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498e7abd1918cd317ded1b82ff54220bbbde6f0f149a4441084fd6582bc4682b. 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/USB4U1314910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08814bddaaaefa642bcb294576101d5423c7b0d849bd4cf799ed23d08e97424. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USB4U1314911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1455b58e4a238494ae839d672a6d3616d4b9988b116cecc8c4fa502272e00b. 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/USB4U1314912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d2631fa033ffdb303946b46111e14e4ede83bb64938e5cffc2046f3ecfa251. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFH2414006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65abd47983861c442eb5c92d8489a5744ceef66dceb31df0705591e6b5a4faac. 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/QZWFH2414009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89f5beb0380d3406ec1fdd69cb253958b4689d40d70a2a0565d0c81778ddc8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USQY51086118.