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 0x24a6458a4f39433fa95ea33a23f83d9d354c165ee32b2f4aa8e7768b30d0f56c. 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/9e0e647b-5294-4388-9179-9f07e47f27a6.json and https://artists.proofprofile.net/proofs/artist/9e0e647b-5294-4388-9179-9f07e47f27a6.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 0x24f213b07f206458f2cb7a284ebfac16df55a8751628d32103311e2d2b8ba9f3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:05Z), 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/QM7282338800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43abac812d3240a94eb7163371a3af62842e8108293c97fbf42c8fc472d9b10c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7282338807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507d7345d27da896e2320ba994f948cae75e17d9224c27e665df59eba970771. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:35Z), 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/DGA0H2314065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf8c568b5f21112162e3acae9cb417374f6920b80821d46a63b42d3363bdc1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DGA0H2314067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa444f2c8f8361fad90d39875dda5c30fdc7df139e697981244257da6b8d3d6e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DGA0H2314069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6675b16eacf65854f368d4c7a5b925f7f21c48a6909e3c830be0309013247cb4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA0H2314072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fdce7fe795b7d709010e94f01b19e873d56c5cc9f07a370436a64f0db0cef3. 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/DGA0P2333214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09cc11b0d589595585c5332202dc4b8e55f014c050b0ccd5966073586e3106. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA0P2333215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb0e1fe98379c9f16ff21a9c1dfaea2ba16380362ad76f948b9f5d1bca792a3. 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/DGA0P2333216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d1e4711a377d14ad306a1c72d7f35a02cd0c498c818cc246db4a09c172c6e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:46Z), 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/DGA0P2333217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ebcca0aaeeaf08cd92d70a049d574ed8065e8b55833e72e30da55b637bd51. 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/DGA0P2333218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945a5dd73a1796e62d9aa22314bb44716c9aa50eb6c4a830b0db240bd51595a4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA0P2333219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef16bd8de61ea1c7436173fd0fd169d509de7295552abc677993e307e357b875. 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/US38Y2523750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dbb2c1f2398cbd2471e0da7bd8a02a7ca2820439676fc35c56295b0ca1825f. 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/US38Y2523751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af01ff525bc078f1036a13761c88df224a8af9ae6b2115b986c7b906ed454d. 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/US38Y2523754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5097853830dbbec939c57cebd753ad56a6175a9207ab24c62be1eb7ddffad. 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/US38Y2523757.