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 0xbaf4ff232c1cdee8ef44a6478a45133d2aaff281fe7b1646dcc810e2ec7f59fa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62ed1aeb-0fe7-49f0-aae4-600c68fd522c.json and https://artists.proofprofile.net/proofs/artist/62ed1aeb-0fe7-49f0-aae4-600c68fd522c.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 0xa6c0818cce228a35281c215bfbac791d6ec0328e53c6b4519dc6e9543d8b0970. 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/QM6N22429783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdb5da49bf6d434ec28bf95208cfc2d38665d58137d1e858d0fb1e439bdbbc6. 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/QM6N22429731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ef2f3d0bc99c10087209def38938382a081b9d36ca6cf21417ea4732c19156. 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/QM6MZ2281369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a1fb5063f3e816d33ebfadce13a792f1af476c2a8b6091cfdc5f320df7d39d. 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/NOHIX2102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132920bc86a547950e84d90ab7fc73c159d6e1c8d50f7e67550f15b1c9535a87. 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/NOHIX2102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee68a24045e5e26ba4eaad096e0e4ed2e2b63bbdb4909e37dc11bbaefaf408d. 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/NOHIX2102030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca683311e241001ef02c8154417c7f367fae6e802483c3c430a1e1c90be18e. 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/NOHIX2102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5b6a6059ce8ceed8ddf71e06a6f977cee1c9f4325ffebc57054883cb7140d6. 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/NOHIX2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd117e55ff8250f1ebefc38de925ba5a3bb5261ee64a86b462f6d2375eabe4a8. 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/NOHIX2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883d07d7b956321c8be00062e9c615f3feacdc430f10b8b86f7844436025e07f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOHIX2001030.
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 0x55f9568195caae10e10fac4e8ab9b7359bf4554607b25e6d659ff4466a32bd0f. 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/NOHIX1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ef7a38e469e066e7f5b2405af61c5d5bcc7a0e7efe3d77f40438b3113b0da. 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/NOHIX1902020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2730681584ebb14eeef0591c44073dc8292ff9520926df47f481eb2538eb26f. 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/NOHIX1902030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faa90104ab36191c3afc64364807c67f304623aee9c454844d8ccbd19058538. 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/NOHIX1902040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158fc3e948d5f0c6a661e341af847f56f4bfc4326d22b22a854e64ed604e74d7. 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/NOHIX1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aabce69fc375a49d5a6623036e7ddd13be7d6c7da96e1eff18f2f77e76620c5. 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/NOHIX1802040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2846aefc510f83e785d49c97f4e2d02bf4fe406f1245f7bb78254e2f0e50768c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOHIX1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8611835c26b7bd6dfc696ad23e1dc9ca50fcf4067bcc792b4817e8c7aa31b566. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NOHIX1802030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58328cfa9b1ffa97002c282c705495bcd3fe16f1bd8c8d4939c0e530fe3d9b74. 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/NOHIX1702020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc51b21f004d4a9820664cd3ddde014b509603a9ff32f1b036a5fde44c8312. 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/NOHIX1702030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405c6326c1f84ab5dbdb8b98901bbe31f64fbd3407c57189b386416aabfc279b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:02Z), 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/NOHIX1702010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9562ef345723a45de1886eeb9fbaf0c1c58894ea406d6eb8b8a24c214ae1e639. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOHIX1702040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb58b740814f3e71cf90d5dacb66f90e84b2feef39e2532809fa0ba95e2c6f6. 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/NOHIX1602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e35878e6c1a92e77c740674b145dabde00e720456995ab71e14defa2ae8b0. 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/NOHIX1602020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e93e17ab52afe9dbbd6fb6cd68690ac24efb87131e9d3267331a2ed66add20. 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/NOHIX1602040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a1cf914de1fb3b47765b8c09abf113ad398e01da6f4806115da42da04e0a58. 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/NOHIX1602050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e54b648dcdf7eff8aa00fc10c4545166b4a095448b68c869dd7bc2e4ce55df. 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/NOHIX1602060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080112b1afa3eae73763e39ee601fe5de9d0bd97cc7fc4b93c91db2ab5122143. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NOHIX1602030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c7451cd80940dc54ea6d84f26e483343be701523fa7128846bc819df260aa2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NOHIX1502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cdfcc7014f6e37e1abdd950f98e9bd2af5f2c9ffd94b72f249557b0ded88c5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NOHIX1502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041813b764557201d0ca1e34cabfc92258218a42b026f88dfadd2537a3d20f7d. 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/NOHIX1401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549476135975abd01bffff53cc976232b271502fcbe5de7ecb075e2444631a44. 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/NOHIX1401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988d8f72edd18a3b78840645f2dddf0fcd09a875985c999ced67ed1a62fca3a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NOHIX1401010.