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 0xf0e9b354d0c7805f6358573e9b9c6d5dd4212097d741255c445e73b2b38f0620. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc0323e9-5427-4ced-a95b-ff8c6a29cbdc.json and https://artists.proofprofile.net/proofs/artist/dc0323e9-5427-4ced-a95b-ff8c6a29cbdc.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 0x529fb0b54b25a1d45376a3863e47e327986cfbf55d19b7bace013892ddbc153f. 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/QZ5FN2217475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c34f283a1b7884fd8d7c74a23c8207d1de84b22610661a37a1ebb34434b4ae. 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/CA5KR2263295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09b1bf1a4398683fa4575451b2e0426fdf5f6ad82bc77dd8efa3a7c34107be. 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/CA5KR2259379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867e712e9b8192f36dca7024b5ac9efbcc6a755892ce7bd46d7655ab57c965c. 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/CA5KR2204594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a96db80f7168de14f3d76e3b8db3a52618c50c2644e51c003ec0e6e2adb478. 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/CAUM82200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27a1296179caef1b8b2e34728a2dfafa06ae6b36a8a3c008f91b54e60865f6e. 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/CA5KR2153416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80fc26a5117f872c7b5cfa6773041ba07cd88fc4803601aa6943490bbf4119c. 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/QM24S2202605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855162dda756dbe9f0a91412b88dd3d1978543cce67beb77fc6d0233e969ccd3. 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/QZFPL2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7557c602413660718b122cf0f294226ac50af8d11c827f57b06d8f7b682820c. 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/GBK6Y2205261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00539deb74ea65c7f45c370c8d0f5cc095e3c0f6f56ac30c6a13da7a8e222ffb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBK6Y2205262.
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 0x23593b7680c86bfa1b3f64dc266994f7e6ae2fd4da5c22ac8faec60289353452. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2341113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a1d562c62fda503b4bbff4a1f6ec398e8799a944529590f55de49d32fc830. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLRD52302502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9e3ad586f861b36ce7f172f996d295334cd34bbd2bf7b9a84636b7cf88c0b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLRD52302503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db056b7ef0b6464a4213ba7a33b066d0e4235d454c4bdc90c3542a601e021f. 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/US83Z2219831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86993d03b865c32dc98b48f5917bf8b450fe47b07ae5b92d9f9897ede95925f. 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/US83Z2141003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfbc25d22eb9bec0d7490c7f56f52ba7cd275e5f8fbcaa7c185099add07e0e. 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/US83Z2121418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f613ccd7081b6803298522ecbfb42a44beb1bf2ab255e07c117078d35e4b8e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUXN21939752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4022f5e9b0a51d47ac67de9ec9ec543ce34b96141287c8a5ac0e810202c3445. 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/CA5KR2010119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c54cdb64777b12f8e21a5dfd550f14e7ce923edda4e5a2a69347ecb4a0faa79. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:33:20Z), 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/CA5KR2010120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131047c742f5897f4af6e2a5a0570e931d6a622f1beae279725471049ad241de. 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/CA5KR2010121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23383f0fccbcfc94433ff9f55de5f36f1c7ff95921fc162cd4f46039b51a7b01. 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/CA5KR2010122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263186e3f1886d9560000b612f5029e69931539ce6ef0e45684748ce9a668527. 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/CA5KR2010125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332258038014f1d4a9de1e6c07b7e7fa611785eb2cb50178de5eb140b72c81f8. 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/CA5KR2010126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919b3e9f8b644a70ea629b51e60458adf4a336b27483758df596ae4589209a0. 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/CA5KR2010127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc144cc90301ab3cc8a12cc2bf169158fc067e4679ff1e43499dc3da62f2ac7af. 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/CA5KR2010128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef215d9d5f1ed99ef980a3a4f54ebc86e2cd768924d1045b4518110c37fb2f65. 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/CA5KR2010129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcb8773648e251d36b87358c63e7550d07adee65ac17d1baf264756490ccfbe. 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/CA5KR2010130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97c7700ddcc51520be53710a17c574088c5a6bf192e3ab94250d661166bc7cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:19:00Z), 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/CA5KR2010132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae4c82e0a5052ba11244859fa917006293a3de610d949665ff2bc6839695e8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2010133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4c8d2de8d9dad141fa038a8a90a1784b861e15532fb52c6038938c1b94cf1. 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/CA5KR2010134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75673ef8118d588e4f76c315058ceebc21e144d373c83f354b04d0d9428bb974. 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/CA5KR2010135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0f5256a9d396be0a3be6936548bad9f8eb6a2c048c56b1b232fae75110fbbb. 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/CA5KR2010136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cb0107902890eb0de1cb09043dbb5502ad959fa7d12364e21844def7a88957. 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/CA5KR2010138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ee9f6f37324bca2369b368a38c4131bf8be6a718a9dcf99bce6dd73902927. 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/CA5KR2010139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0e2bf7560eff6161bf81f48b9008375fa20087b8b83d49e7443086377dd6a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CA5KR2010137.