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 0x9c86ea95dcf79b37e2c6321488fee2e6e539107d9e108d154970e1572ff42b08. 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/d0d66087-0684-4450-9352-f10bc4fa8fb2.json and https://artists.proofprofile.net/proofs/artist/d0d66087-0684-4450-9352-f10bc4fa8fb2.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 0xadf332115a1794860a6630ead43dbd8f0c5ba8f3422e6cb230c9428f1139823b. 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/DGA0P2484859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9738353eaa607b47ccccdf8acce4ca2efe0745d101378bd6e12d8733ec338913. 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/HKG732464732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09554b874f4a8b6ec5948e58beb70f9f43bda9972f45f65549d8e457bdd45b7c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732464731.
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 0x5c47f38e237a81306220063aa914a7f3a7157e06309db0329312a465c6190bd3. 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/HKG732464320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24265a5138c9485d692825a62f1bb1d9469bab729092b04ead9d2e51e1d06fc. 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/HKD012301587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7547e56c332938f2d7ad4b1d25f85345ddb2d036442916372fe703ad207266. 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/FR96X2438091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826e1d3391360519b23e06a6ab63ec04697b7862f3b55220af21b4fcc384be6a. 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/HKG731681194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a9c48834ba33a2717fec0f20cab33b683207184fb55043fd20ea9043a9800. 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/DGA0M2321405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8803eb0b2515d77cfd1f00c5259fe74760a152c17332709ed0573ced0825be70. 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/DGA062389420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e68bfaec06ef6e51d7449e76402c3eb0c0455745794a310e7505634632822a. 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/DGA062369142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871db2e93eeb8d52e704d64961e296f50127cf4fb2a858be5309ceb6a5f86c25. 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/HKG731680699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab45b889f9caadfff946e9959bc6796c29232c3e68b80cc91f50b04ce468901. 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/FR96X2363390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1e350d1f50fa4b7326f31ed2dbec148b1ad85eb2ee89f55ea8fe6f23192f90. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR96X2363391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb7fafc9cbe1742e10e038a075ca7fdb2be51c4de82ae56769970c4d8fd171. 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/HKG731600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933bdf7ba43f9421655cb35c24948cbff208e958da7c7adb882e9e22d62b60a. 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/HKG732237745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16a1ab2d628499676a1a728d2f1e6c8a1bf83401408ebb8a4ecf4f77681303. 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/HKG732237746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5880a78f8257804472ae38b338829a647d65c1948190f027f8e2736d052650. 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/HKG731720470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f85263a9aa4b30c1a0c034633a94a2b2030223b531e23a1e27d9cbcfd1f88d. 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/FRX202180896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c549ffa82021aebfeb836c62d214328007a73dec1dd7a1c263fe683a1cde0f. 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/HKG732026896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a98191ec35f3e53247dfdb76aab1810c1b427e1925b2e7c43ff0817b190bee2. 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/HKG732028901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a79af17476f27e50b3ef08ce0bd8512ea7f91f18d1383740738dd6b8c1f63c. 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/FRX762072166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd86e0e71bc13b14e5a405f157cfa1158039ed70c13833c407ef3260e5012a5d. 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/FRX202042907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c3bbf1fc01099f176af5f14fa32319dc655e66b3bb1466569f9f547cb47065. 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/FRX281911938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf65f633fc4a84b0292be09d1066f86381b6b65024b36edea346e772eab0dea9. 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/HKG731676915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd07fa5efc163cce0e679161d0c402c41203c4b29160d3c4bf41b29dc0dfe3. 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/FRX202042903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ab7df90e9ea795dc0a4aeb4b60bd65d28c139d2cfcc867e7417b93d2d8843e. 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/CNUM72400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89866558533e228187c8b1fb1a4539cab9219fd0c41366fafad8cead61355294. 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/DGA052355150.