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 0x427fc815c1e369469b9678a6db6c395c246fc9799ad5025043ed9ebcf588e2be. 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/5ef2b04a-f903-4b16-9484-9f39ffbdcd24.json and https://artists.proofprofile.net/proofs/artist/5ef2b04a-f903-4b16-9484-9f39ffbdcd24.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 0x2c93bd5fc9fac60d95d543db4fa7edbbbb198c97dd8dd5193de1731759440dd7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZKDK2164725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c588fc919cb866555c868b65ec99a37bdb9c6c12d2347113c9cb184afa51493. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZMHM2018693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd648d3565b152e98c510706a1c73c5609b259000521af9b9619df633aa2a6d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMDA72256545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d137cb3c447a46a7b9f2ffc0b82ed042ffc7e12251e37e0e85d5652bb4b3ea0. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QM4TW2363490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843ac90115e21ec18115f00c10ac70c0adbd0c86d4c8ba9cda32465432816e6c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TX2507235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f289a3a22a080d3587c076fa32cf0343c3bed2ec0b49533fbf4c4c0638ae214. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM4TX2507236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207aecfe1f7279c0b3a83b23de3cad47f13b3e60f9ddfacc25f14fe2a1bdff1b. 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/QM4TX2507237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747f19c6d0206ff93e70e11b094d1c980665f9e808e65a628d77c31338452d88. 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/QM4TX2507238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa752f3e1174f1fd1dbbdd0e8871df5c449018ac5958f879a4d65d838231a5100. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2507239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421c0667bb3b2d922367488eb9d20717238e8085eeffb6d28e901751f7fb9ab. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM4TX2507240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a55a21597b3ba117bc91fe6d81b4c9dbea76dbc9dc94ec1e3d6010ee6e18f. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QM4TX2507241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd95b7dc308bba8a5fb6f155e6d4e56a9cb80fa65d49aaae0cad4cb18ee008. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM4TX2507244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b002c68fab9fb3d6171146f161e35fe1bfe8c80a95de8c38dcb5ac69e3119. 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/QM4TX2507245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfae62c4c2a6610f8b634c7008bdc9b4a2d4968c84156ce4c46b6af0fbd82b5. 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/QM4TX2507246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20171974f6770f8c266d97ca22283f1ddca985647efd9ee7305f55454eda339. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM4TX2507247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4d869298ae2f19463d7eb9f47ad9afad3d525d7f1f36beaac789c85d356fe. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM4TX2507248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e63e843396ee1ea37f8852b47a56dd17974179fd3dafc4bc4c4381a605d0cf. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QM4TX2507249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1e5e2d37a8fd44c5ea7c81799c87a62b7926478c27ede09436529b36afd53. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TX2507250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5719c62e7efac293c2ad060942806df6731fa9c218b97ac9a216497b8cf2012. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMDA72576175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a83c6b358f461cd4659c89b6921c3d008fb91f958e59886f62733136365a80. 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/QMDA72576179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0be522c0328e841dc86626375c729ed7e559f76e483eea42b2733057337833. 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/QMDA72576176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b8a42cba28afd9eb9dbf2a1226b64ca67059a08cd4f4f9c294ea50b0229141. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA72576184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc792fdddbd0e59af191cdc8767654f516cae381080428fd49c3f22503187264. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAHH2371022.