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 0x00bfe183cebaa01af9e752d4dcf3a78af2373a39810525422d083af3db614b24. 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/b3c1e4ce-350e-4dd5-b9be-da71638efe9a.json and https://artists.proofprofile.net/proofs/artist/b3c1e4ce-350e-4dd5-b9be-da71638efe9a.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 0xa3f0b498193ed1930ec65f7cb6cbad620093a897f9b1e81da5802ae85813bf24. 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/TCAFY2145560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc151853ff8799d08edd45e7eab2f02603a8c989983e4270cf8d595b9b1ef756f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:44Z), 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/TCAFY2145566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbdca2c13ff13706159e35fda5a59c7fb395c91a7970d956cdbdfc64eb89068. 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/TCAGK2208932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e1a8f10be36d2280244241f4f5fb7f15ddf0740725573c76912729776ae39. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:49Z), 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/TCAGS2215110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44534c0079b13efeaaa36314f11588acbaa86da18f7d6cf7aae4038c5d07a94c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGS2215112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ff38fbce47353dae71fb3ab6c2d0e683db35542301a5595f5c3d7d26e05f75. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAGS2215115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d2340f237a84bb47b8d362ecc553119073459a7ef4aefb61481110808d0609. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGS2215116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33598f432824c0b7bdcc2b807daa18df5c55b4c7c8867066d4e6973529f64bb4. 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/TCAGS2215117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a59820f0348b39d48a0de1dec0c21352e59a16d58b2cbad85a8dfed501fbb3. 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/TCAGS2215121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b55316de155e2ed77cd52c92cada45d988cb81e12aafb34fcb6d755c1b827a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:23Z), 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/TCAGS2372689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a992ddf8f06efc6067178bb0b93ac1409e4cf073562fb04d08f0c3358952ed1. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAGT2360435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33caa9e76a43534840b7c2e97622cc7779b2c98f50bedc9b5df40bac5a6c1224. 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/TCAGT2360438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d152e70b9eb8640e718764f139a7b7d7ec4261eb5a1fcdc123b077ea6a7f28. 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/TCAGT2360439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d756d8d06178599a0fa78f3c1c3e55c4bb2911337002fe8e62e8189f59f0f48. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAGT2383692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b7bdbcceec685c1c4c51fd240c1158b92a724fd84c8c4562f7f41a4ebd42a. 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/TCAHX2411231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c76b4d009f3bab598d34c7c05e73b9b1d84c0b3c00c9e78b5f2bf539d41165. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHS2320091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ef2abcc0be5a6126d25bc67360f0b7a9c1a8ad2090b6537b7b7157915b86b0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHX2421964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec54e73af4d03dfa3d5a80bbd30ac87c3f86d690b4ece7832160ec0822600fc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIZ2436994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93491adf7ea5ce51c5c9f59124469b2bd1a002cf265c5d7125a217126836e7c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJL2501177.