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 0xc7d789d56597bc9e209a727bf00165ffae6debfd8cccbbc0178cb55b42485996. 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/e18fa734-08e9-425e-8838-e9cd1fa820d4.json and https://artists.proofprofile.net/proofs/artist/e18fa734-08e9-425e-8838-e9cd1fa820d4.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 0xef0fd92e95b6b79c585d163cbd69fe97f193dad11a0df07b3c496e37c162936e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/CAIRL2305201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc16f6ced7351073a75d2bb0d2a1d3021926ff22049f894118df8bba5d97280. 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/CAIRL2305202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c60deeee24b8c193bb3d0b85bcdd9517f400f7a1f264f4bc32b8c02d46acd6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAIRL2305206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31506554228c92605ce950e12d5c55a539d93c16186316f0737682a7154bc1d0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:23Z), 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/CAIRL2305210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb233d06566d89635571cc19abb85e6bef39bb8145b41de2ae2d88671f526ee17. 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/CAIRL2305213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7838d15f9fddf41416448f8f18922f9396ae95e3e1ac6229aef0dd3d4328e497. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:32Z), 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/CAIRL2305214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98a811c00728e0331e38c4c926b72fd5179ca10b9310470d325977c2219ce7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZSBR2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48fd60167e86361f0a16bd426df8c19f1de969258521fa7677a80dcd61d061. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZSBR2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98a811c00728e0331e38c4c926b72fd5179ca10b9310470d325977c2219ce7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZSBR2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e0b4a2a131b978da94206f5de4db63df10f33131434bc948d8bb0ec4ab9ab. 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/QZSBR2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48fd60167e86361f0a16bd426df8c19f1de969258521fa7677a80dcd61d061. 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/QZSBR2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210991fb8165eee3ba5e3c764a5c8babff373b0abd6d272dbafc66cffc25b284. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZSBR2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98a811c00728e0331e38c4c926b72fd5179ca10b9310470d325977c2219ce7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZSBR2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c310e62322f119eb3b50488173739c5005e600fb7d57cb8954e718acb8e27c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZSBR2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77abd928e1e42a9edae909231b891c37c45e883ddc2187792a4753cb0a41550. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:32Z), 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/QZSBR2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b36db95ade25c91ccd93b912c1ca5cd845839e89a90d4b7e8c1d67c9ed769f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZSBR2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bd387e47b6c4969814937b3d11fd5f391dc668438d6b0d81a06b7adfe278be. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZSBR2500010.