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 0x081c1ec5e70fd71b019f002a0d92d90bcd059c3447d52d4fb5db20faa7faabc8. 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/d31eaa57-ca0e-4fdd-adef-decd08e6f121.json and https://artists.proofprofile.net/proofs/artist/d31eaa57-ca0e-4fdd-adef-decd08e6f121.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 0xfd7c9aef8c522348a82fca7211ca0e47c7f9cd59c4a79d6d966d165ba9de22fb. 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/TCAFH2058931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fb48fac558830358ab6cc70a3da3a37c911c347183d6bc59e9abfe6e3fced9. 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/TCAFH2058937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4262a293164f3599c91bf12852f96242269ef3b90702647c9443db631d9aae. 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/TCAFH2058941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558e37247c8c6b0f0cc52dae76b68dea94a61e38d5e19e361416736b948b5703. 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/TCAFH2058958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b5be448eb4e7c2ad79a7f207fd198a41b5be8634ccddf635d0aff467c95b7. 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/TCAFH2059091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854b87443964c3a31c167c4063b56ec6233147b2188ae978a8f3da50c1b993a2. 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/TCAFH2059096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bb621515eedb5a08e1842e1db54a544c78fe50326cc0b252dfc94fc16b3776. 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/TCAFH2059100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8895944324269473f6af4861e5284bacd7c0171c788b8738071c5ec58fe8cef7. 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/TCAFH2059112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61452b1e7b10ceb0382ab0c52e48957f8c4bf14456a65c5f3dd58696ac26d6af. 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/TCAFH2059129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f8c7e7d80a74c8e9e25086633fc51f6b032068a2f6b18c15bf7bbadee4448. 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/TCAFH2059149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7c0c78dcdc07ba6ea175dbf9f260f547aa0cd886b23a7143d14b436315e38. 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/TCAFH2059162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3dd20315434ecb1e90f8091dfaf2695510987397d986bd96e814cb2fd29f2e. 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/TCAFH2059195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad7072f86850b703697bb0753d79ebe1758438f9034ef95ac28f92a5f632ad. 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/TCAFH2059233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d359520c6e5d7d686b03a844d312f274715f9b281ec060391017b3e8f86688. 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/BRK751700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1845d557f11c90f991651a940cc2b7db770f03b312d5eb28e23e63a8df3fbf3d. 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/MXUM72001469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940777ddd2fec47c7c9fb798a6e3b6f8dfb99bf678c93bb4748626e49a6f7280. 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/MXUM72001470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1845d557f11c90f991651a940cc2b7db770f03b312d5eb28e23e63a8df3fbf3d. 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/MXUM72001469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191fe9b2a3a3627a95eb247ec3061eb286f33d8837fe9f77bb002ef33b8fbee8. 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/MX3741700323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cf1ae9eb0522bba1d924a14da317795cc4649a3c0a041ab4cab3328675d55f. 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/MX3741700324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d317e5db010fb5754d4b978cdecc0b949260a1533ae69fb848a4dcd983af14. 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/MX3741700326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7048a54a37a90e63e05ee39f651c0067d7c5c8ae15ecc609619991a1a35b17. 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/MX3741700328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2fff7b6d1f09525f2aa356638e6ebd45445137284546c5c9c3d24b05a3336. 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/USER82006208.