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 0x4dc316716aa8e330ef5ade3ff91c8d61be0316c2c03d8cc4698c374acd1e4ce4. 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/ebe3a83c-f15a-439a-848a-1251f01c6a19.json and https://artists.proofprofile.net/proofs/artist/ebe3a83c-f15a-439a-848a-1251f01c6a19.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 0x4830ecfb387a7b2f10a16c4d96eda86a0b04f10d9c70e0d26aa39115e773e442. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXCOM1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42966c9fa129559befabba5041a51cb79836b1999495ee440b604176c0beeb49. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXCOM1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c90f3e93f3f42d74a3893e7767389f025ae4aaabcbb348104b29319262d34f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BXCOM1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbc036148ccf34f7c543a379aff22dc704ee8396a19d739a84ce0dfe16b2ea2. 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/BXCOM1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013383ae2dc714429d531b71c0b86c5a76952f2f1b12e0ce2e03d857322545d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BXCOM1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab408bc513f8df045c521de7a45295670e456e301af95b7146fb1260b26001. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKXN22328226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b85ddcaa4275b8a64a374d3e0cc8209bd4a835e3ab34c03effbe41f7f929d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GX53U2330747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9cda79a15b7ecacbb47d1c0e80501939f7eb038091d1b5e41d5a51a97726de. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GX53U2330748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b58eab5a211dc778fb8d171c53fccae3d35fa14a74c28438e225c826ddfbf3. 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/GX53U2330749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04f508b8218f60f96ee25bd595002479e1d60c4cfcadaf1751c13ebacb88121. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX53U2330750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfd0bcd5cdc46af177b103d098f5845ac2af3a05afc4c11936face589093114. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX53U2330751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0bdef40a76c50d1d968de959fa75350f131e383a1037ed7d57ffce09ba3e0b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GX53U2330752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e61b27333c82f5ec66dbf550656f537e6f584dd9961d1d16ddc91a7d94cf0. 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/GX53U2330753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fb293b6a771146df9d9b3ab8c3f16c6edc6b5498cae3c3f607df388c0d10b1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GX53U2330754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37911feeccff8bc27b10ab9605e08ebba249869dcf922df3f17b587ce86c759. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX53U2330873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64be42781dc0334ad6419ff5436481d44ea815f1f0db3fbf24a558e233384663. 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/GX53U2330874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00529936fe980868fd141a70feee8ed1777a92c901e8f6324ce69623b2e1df. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GX53U2330875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ebe4e915e43def6cf9ad05f558b7686534f905461dac32a4a05d288ada162. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GX53U2330876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa830f1d42f6cbe6d6652020701d73e5e00aadf0b1c16e7404644e9de246b4d. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GX53U2330877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57417721ae8759d96d409e5aab1f9dc01d29529040563fac8c87ff09ae241cbf. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GX53U2330878.