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 0xd940949210e8618e7c9ae24b49aee32bc67f6038a468da3aea4a40ce7b45153b. 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/7c1896c4-d6d2-4f55-9d8d-88667fe5cd7c.json and https://artists.proofprofile.net/proofs/artist/7c1896c4-d6d2-4f55-9d8d-88667fe5cd7c.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 0x14fa6c0009557a57cb3e409ffdc359d4e15a0da762a40aae97d0c7b4864e01f7. 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/QZTB82282818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b896b15304f78d7fdd416510d6d196a4ff017c25fae901a6ee7076f4021320. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHNB2315250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e02e3459cceaeba2c2ba3bab884812447e3a6470d2dfa336b5294aaeb920066. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNWW2356820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b065113ab1eabdee5923bffabaafa43d52bdcb9ccf1d6ce0a8ace80594904d7. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLCK42340680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35337e4c80b68997c16add66b46fa3892eb21233aece212f915ef478c1d4f4d. 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/QZHN42489822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a526a9f3d3f7f570ef44f97c4e5aa9aa1972488e33fcbcb37a40ad6e5b46e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DE1KG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cf3372573e9118b5702d2f991470b25d09b0cfa8d0193a1deaa4e835781ffe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DE1KG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49328551bffead34c71882fc8cefe904d52dd4778784a7fefacb940a7836ea18. 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/DE1KG2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685aef4cb1add92e1ea81a1e80a4e5b08922afc346d0d90066d7e8c10e93c1df. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DE1KG2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29e17e82f5e599ef8e23b76e5e4ffc6fbf41334fcaa7dd5479e9bd670e53a8b. 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/DE1KG2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c976b2bcc50904ebe7c2820b6fc3ee973bf449492af60d2c2e5dd68df1bd9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DE1KG2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c976b2bcc50904ebe7c2820b6fc3ee973bf449492af60d2c2e5dd68df1bd9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DE1KG2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49328551bffead34c71882fc8cefe904d52dd4778784a7fefacb940a7836ea18. 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/DE1KG2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ca19629782b55be101a033ba686c89d03daea4c8fa79ecaa42bc762f7cc6f. 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/DE1KG2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f6926e9a9705f7b7e26bc0bdf7004c99e2c71ab15314889eeb8bb32ec2e1c5. 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/DE1KG2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337cb388a953911b49d92b808253143e8cc6aff7c7688fafb201f29151022b7c. 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/DE1KG2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1104ee53dc2a7d26b8468e13be97f23780442baa641886a954bccdb0956a4df7. 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/DE1KG2500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7843dbf06154b483d1a2663559f489b540735abc2827df90c9674c4dab6a4a2f. 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/DE1KG2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa887ce23069720fa92db72854775371563a1c64a7b16904f636fe0e71789984f. 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/DE1KG2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096efd7c87907202cb85c1fb818a5be8b7da176a871dc79309866c7d4032042. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82326406.