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 0x014408467ec4cc347e69586443b1d9d3d3b7f0809663c1914337e823038c49dd. 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/d7c88f28-9700-4f28-9e84-f0b4a6600f02.json and https://artists.proofprofile.net/proofs/artist/d7c88f28-9700-4f28-9e84-f0b4a6600f02.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 0xc17c2a9d62336405d241ba24f7408b813fd7c0b4c7570f0d3ccb41d37f7389ba. 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/GB9TP2000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672da04436f094cefced429cb397e11cf91f49f4f99f568c028d09bcc9a637e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB9TP1901643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad1104675f1a16fab24f1ce693ceb4c0a3db3becc4dc175f15a3dd0eec654c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB9TP2000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0dfadf208a1a1bf69e9b06ef5f1ad3aa33b42e8f29708912c973654c7ffed. 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/GB9TP2000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952c94531f9dee713eb816ba3ac05a33deedc683c10a54b043a53b518f47ef0. 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/GB9TP2000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334be9168bb2d63435b5735ad1ba47cf781d551bbb14f86a4695a55d03630a64. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB9TP2000519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc399098aff1b8d78851ef12210c32a27870e9d1ead41774d366a2e7bdd2133. 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/GB9TP2000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9892dd20c1f0a22ed31cfbd48507d1dae1d02556ed16c7d1d597e39a09a87b9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB9TP2000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4a9bed6b3b7731ef7d5d76a31823bea8410be1bc595d17030ba4c58a3e5d5d. 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/GB9TP2000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea3401a2f602d5f2df315a438e9a17d1b4086ed7d5c99d282a8bab7a4971cf. 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/GB9TP2000522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecfb37de3bcaea85f6b34f9f06b95aee0af278ef0be48a8734389b81d050eb0. 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/GB9TP2000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952c94531f9dee713eb816ba3ac05a33deedc683c10a54b043a53b518f47ef0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB9TP2000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9892dd20c1f0a22ed31cfbd48507d1dae1d02556ed16c7d1d597e39a09a87b9e. 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/GB9TP2000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672da04436f094cefced429cb397e11cf91f49f4f99f568c028d09bcc9a637e. 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/GB9TP1901643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20e071213ff1b3df3b20fcfd7ef6cd59b8f7e29eb575973bde509e66deebd7f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL1796083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7ad37bf89f272ee36480dab8028a651818d1f755b69ac3c091f3f52b9a045c. 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/GBKPL1780303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed97ec04908282534a9c35c3a997029fd8ffba6a517224468aff8ae8fe5315c4. 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/GBKPL1667697.