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 0x5fefe648763bcc581125f33916044450f1bb452813bb93f683c585a4d38d9bc6. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0f867d8-a11b-4c20-b4a4-14083af332e0.json and https://artists.proofprofile.net/proofs/artist/d0f867d8-a11b-4c20-b4a4-14083af332e0.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 0x279ea5fce814d9f38f9c2443d908f54a503d0c9ffe9f514cd867bd9cb774f8dd. 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/DEEE32017802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e85555f25b368ce7e4a523c8b67b78808ad3cf1a7e86de6e70128ad0e139e. 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/DEEE31713501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9528146b0cec645a199346230e5b54a102751430fdc64ac6de9db24d959e4d1. 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/DEEE31713503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fda0d424c76b4b7f7293cd7b946ee4480846b96db36c84f02ff3766b72bfbd1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEEE31713504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109748d77578fa93fe337b9b230e4759655c146dd0ae1e97e853857c68261f6. 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/DEEE31713508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f1fee950cc753b2ec81bf4289216ece6a965d63de4385d37267ad618c58e34. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DEEE31713510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc4a0a51666c9ca76737383da9c173a0d2caacc413a5088b9df316038957ce. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEEE31713502.
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 0x55a58cccc2e2d24e4fc0d8f0dd71f0f7124afd4fc5bf23acb21ea732081e6285. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEEE31713505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255b58f0c6c5d270de98af19b41a76e8f1c733dcb060af03b50a35390c219efe. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEEE31713506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eae176cf637806aa16706dc27fd44c236335c5fb2338630954ccb0ce125d60. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEEE31713507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a4a76ee6726053af0cbd93718e8a8fa1d2ec022d2358035e550a660c969905. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEEE31713509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a13cc275ffb9a5def8c2525b749438932e8a64c5575be13cb781577076c4de. 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/DEEE31510801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca35eb78845c19017be5eac329cf2e5a0148cdbc92d16c7e708c88dcf9e89d6. 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/DEEE31510802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780cdf1cdad7c7396ba8534f27f7243420df83da8822af6c2192086b08b48030. 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/DEEE31510803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d079b210072b64a0f7af2f8f962bb0c892f55f3609a9452d65441f2545ec438. 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/DEEE31510806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d11ae8b212e1cc0ef1eddabc5fd2bb6302e070a87be90a12baa2b7d1d9fafa. 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/DEEE31510809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202ad75c7347c36120d7d3425efcc5f97764098a7c050b2568adad433be8fd7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEEE31510808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01306738c6ffca7e7b501ba679b0cd57f29c3a7c4130aa82ede843fb65cbd74. 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/DEEE31307701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12a3c0796e001f793e699e7548ba5152ffa32ae2a5b3464f1eeada1115f27b8. 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/DEEE31307705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe701c6533759298a4e3bd739ac5948176ad39dfc209baa4165b7c03bed0626b. 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/DEEE31307708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8863c72086146a562ed26b2d226131ad554739229fb13efb547ad5a16d829f22. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:17Z), 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/DEEE31307702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dc8b71c8f0792cc5e2aa99bc9fc1f064fbffd5c9fd85b1c103b9b19e80233. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEEE31307710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0da169c0d48d7d9ba59677fbd841bd3cc77f7161f9f46bfcf81c3a79bcfe73. 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/DEEE31307703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fb7100428bc393a0c43f51be3a4a1f56664e7f5dc0ae91711e7af6d0ba21d5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEEE31307704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c79211ea124227570b0f3396ff1ca9ed9300fe3749f63be89ee364f0d2ef5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEEE31307706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737dbd6c57014a83c4f1f4ce1eba5a4589f5051c7f144a29a4283cc596dc4ecd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEEE31307707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95819e7b52b7cad5b31d818a689cf770f29034de9dd0ff21d7883f3da836074e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEEE31307709.