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 0xc974dbe64e3d16c8802663071c8fd6220de6b39926830abc1c73c84ec258b6b9. 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/e38c4a04-a7b6-4d3c-9187-9de156a54f28.json and https://artists.proofprofile.net/proofs/artist/e38c4a04-a7b6-4d3c-9187-9de156a54f28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0a5cbc21bfb567ea5fb3b600db10862f2c70a84443934ccf96b03a27cd6f1d38. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIFDP7400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010a3fdad8eda51967f13f90890f64cd07fe541fd26970e74f98a9637274788d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIUM72000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6187296fab27d16a0612ab2b8ee499d3b690aad4db55862967a08cccd63fd583. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:24:24Z), 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/FIUM72000429.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199492eeb3c4bdb437fa49c5ce92c53c61a2c29a7ba77ed182e95296cbc39e5e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIWMA0800724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4fd87c7e3011e3accd575e73b246e79d61d99c100353086bca081ab176c34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIWMA0800728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60068fab1fffaaea27ba56c2923813762dfa6641f1baf4e21655375c4a54fdf6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIWMA0800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107468dbefc1241245da6905ec9e2e70f7509c5f8611170ead4588635bb01031. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIWMA0800732.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ba841320d17214249d7faf500d65798b193c9fb9b037aa9241460c9eb3cd19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIUM72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8be574e601b33b25bbdab8facaae191e77e03a7bd1a89859ff2a5c58655b9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIUM72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be38fa2c4eef92fe37f25a84ecdb0de7978a831e10006f557f295a1c30a831d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIUM72300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c29cca3a2eb025cd03f7fca81f65d7ac7d098ca74842f93337508792556b56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIUM72400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7775d3581281708f628d2bff7a4dcafb788fd607306f1317f527df9c812458. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIUM72000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0941b052ce73ac52e0cb0d4c4d05429a0a3e8b1a8cd8033c1c50176d0f731b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIUM71900352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d05fa3d79be3e4a116b2b9b7019b94511498c58adac30fa9881b8340e3191. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIUM71900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb685e9349fc66a9111a4e0f4c9b41da36bc1a608e57a7159d88ea924c8dc33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FI2KR1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd006d22567b461b9ee7e4baf79d8f43277f93ff70fc939725b08b68e581d734. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIKR15000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5161dfa7f5f804e986a9c7ea0e767bdb917726f2d02fe2b6f4d40ceff624bd96. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIBAR1000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217c1da77118427bb05458352689b5cce5173347bd17437e4e501521fb143a33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIUM71202025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbde69db4a84edab379a12af32dc64ad3fc343b4eefb102d4b1aa9f0e9ed037. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIUM71202026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8be574e601b33b25bbdab8facaae191e77e03a7bd1a89859ff2a5c58655b9e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIUM72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be38fa2c4eef92fe37f25a84ecdb0de7978a831e10006f557f295a1c30a831d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIUM72300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84a5041937439a3bbff9187b9eaf0ae26a7e0e3a7b804310627929db69b401. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIUM72100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47078748834d1d7368e3da3690f987fff7874df9c43083c8268ce2ab529bf914. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIBAR1000220.