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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 0x6a58e743dce5f8d536dde1daf644f10228a3e4fd30c2893b734cfa679c5ce3c5. 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/8b132ddb-162d-4a46-acbd-7062f3dc8e98.json and https://artists.proofprofile.net/proofs/artist/8b132ddb-162d-4a46-acbd-7062f3dc8e98.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 0xc652b1e72f40bf5cc970b12331152d8a46925a920f6659d73893ada2656a6d51. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX202082809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd72a55a939aa4028c1133f21adff250cab907332e6f03a826d5439f85dee7. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FRX282164116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea83f50f119eab56074d8789c44e979a376ada25f509d46b33ff238f806a39. 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/RUA1D2268617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf594ae32b68851b6393cd801844e1daa9f51fceeb842343285fbed65ad4b8c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUA1D2268619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80eaf4a58bdadd24fcff60b2fd5f58f0484685aeb78f2ea9c239af09a378197. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2268622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32879b76ee0d777869a569711b48f55e4fa84828ce065fa0d34446468d16174. 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/RUA1D2268625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302ca9e1ed136893586af23a501fff81c9ea87bfd5f1d6c37f2f5e64e01ea08. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:40Z), 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/RUA1D2268626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b41c87e71074c858c4890d22adbab1359ed71218c634477cbdf18ed867e57ad. 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/RUA1D2268627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a61954288c0c9fc8dbed15c5b0f1804ee6804919589c66b95ca7f1dd182a68. 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/RUA1D2286170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6359b2e9fa657476b648ddb5fbbf06c4c79676d9f73053d83fa3326cbb2f3a6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUAGT2318438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133eb0ce0f744a9198d5fae614fd0c0964d58d91ab1e4a4e85aadc29c2b5b4f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:20Z), 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/RUAGT2328734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02c34a3ef3c7606e6dd5cba2d0041c00f6d87f1743b3bd074b8867710ae90da. 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/RUAGT2346555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab3995ed98792eae1910dfdbc6850f0ce306680ee0d9675fc9ecf8f5c72db22. 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/RUAGT2346557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f41d36f6bdc892e84017b9a5915834a93cdb12cd93bddbadb0d059799e0cebf. 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/RUAGW2501772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2bae95b6949186b9264047a9b7386a1b8989edc9778102fb1ea3ff05f5d16. 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/RUAGW2506018.