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 0xae89631f3512c90dcecbd4d66766b08a0d0f94ecc14dacc8165dab25772c0a84. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/313e5ca6-36d7-4702-b6e2-3d8f5532b7e1.json and https://artists.proofprofile.net/proofs/artist/313e5ca6-36d7-4702-b6e2-3d8f5532b7e1.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 0xd7d452705ba045cbe0678d1415d4a6e7862522e641bb27ce24364d6fdaf37bd8. 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/BGA472334758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c555b1ce0c78d314187053a145f3cfa6298a34175ad5866f9e7c6d9615dae0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BGA472334761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fd8ceb9d3134ccde690f1a6e5feccb35d70e4218355ec4bdbcf3041d5190b7. 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/BGA472334762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8d6ba107a477d5cdf259bf641ad90580f41c465b6e8023997005f6de17e5a. 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/BGA472334763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3ac2138872098554ae4dad229ef78acd593a84eca6a06e1b6f15594620315. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BGA472334764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba177c51de78dc2e812cf8e947980726858a1960fed9fe93a89901cc05cf85. 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/BGA472334765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaef968f8615f43eb24605f4df15cffbfa8c48e3c0ac34580bd6b5922c53cbe. 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/BGA472334766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41cc9f67deedec171eec676c98fb081712f634441fbfd17c7cb4466e4deae2c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BGA472334767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f9d2e55766c11ec9701415a3230cd017d9927d4a288a86e382f1e4be0a2ba. 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/BGA472334768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899687f2493e935a4f389897c191ee77b5a02c2ef6812816d0ebf6d348815207. 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/BGA472334769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3030b4e67c61608a5f01475c2963b1dd725c633211dee78e75bc223c51254520. 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/BGA472334770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9935a19a4f22434d22125ce32afbe710a335934ab1530e58c9ba2008f98aa76. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BGA472334771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4767daa9324b3989411ccea1ecfe47f34c05117ff87558d643337f43b828bc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BGA472334772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e6abf663c5e880d0d64ef3eb70473b40c577799b940157a676be7209233dba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BGA472334773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f34c5b3ffb9e536cdd5b77846ff8d487572ad1b0d13bdd4ca4617f0991d72. 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/BGA472334774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197bee9d9ef8179e3159db10d34070287cc389513a9a588f4f704f759881ff3d. 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/BGA472334775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b164c162591b6c722d02181d74eaf6bba470a9b4f92e4ba4d1a300ef51764. 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/BGA472403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34325b07fe03d210be845a7ca74537e4df4f883be12909f17be816a6ecf150e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA472403646.