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 0xfd9184647ed6c074a1e85dcf58cb09267c279b722bd9658ebd79a60b9c52b9ad. 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/3e3fa5ff-19ba-4312-8548-e4c3f489f300.json and https://artists.proofprofile.net/proofs/artist/3e3fa5ff-19ba-4312-8548-e4c3f489f300.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 0xf0eb2910789d74caea0769fc06d3cf747abe569017ddeb1a7bfa2673709a07ce. 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/NL1AP1962909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd090874cdb7acaa479c39f0a2849789fd2a8dc3e3a8691237d41ebee51551. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XD2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda94374189a2208bfbcc4e77deecfc1963216a2bd3b42712e76aa03eab86027b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XD2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c06478750cde2ff93d82cc04822763f30d36ecc1463f3f98950c80a97008aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6XD2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f6f6fea8e7e8783e6e70a1d3961d9ede39ab128689b7679888d987235d2eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL1AP1962911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339216c9a11d1e953a2ce9b06207e22b8deae33f7145be5a76552baaf88405e5. 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/SEPQA0124080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17803c70e2eeb4935c54021768ca33298978ffc2a98cad0f41fe99b0c43143c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE6XD2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed098a4b0cddbe98706c4dcab0e8380e67905ca1cdedce65e11c4683bd7c1cc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SE6XD2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7b12a39f88fece29111a4e535e3c29c19c6d17c98c3047559ed82727ec4c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XD2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341451b43faac9f1af3d84e14fa6fed10953cdcf7ad2a62af0f9fb794ee0cc8b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6XD2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89947f5a1b1d0abba7d7f1030640ba537262fdc670a67cb0d21362db83684f8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6XD2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6af83d6644f8fefd20a44710a5b65b7dd71b84468bf4a7aa2f474a05bf8beb7. 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/SE6XD2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc09ba6896e71560a43a0104352d54f801ba1210bf77d5fdb44027035c96d7e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:13Z), 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/SE6XD2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566a550fc4b450601c905d3877e691e6e6cd13f227727b77854b29fdbe12f7e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE6XD2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5bdfef1e997357b2fc06b954a70d13b2408e1d656a92375c7cc48e9e8ca6c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLS6R1861626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f69873ab0564995d1b11f5b81fb37462fb954b5db743ed804ea6866485a0aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XD2000101.