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 0x835e2e56ae7200c6a4ffe0eaf3cb467a41a122f33dbef356d06b25ad8a23da0f. 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/3bc95be0-d760-44dd-b559-b4a2a58baa1b.json and https://artists.proofprofile.net/proofs/artist/3bc95be0-d760-44dd-b559-b4a2a58baa1b.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 0x90d7fc5e35e038bb792baf2639e64ae2bcf45dc54a85e22e267b43f701610931. 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/SE5Q51817782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de7039ba30c8fe6db25cd52ddf7bf3ee1ef1fdad52f6856f2a5f7443756ab99. 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/SE5Q51821131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e402fbfef20a30a8dea56de6281ef09187ee1ff8151044d4855f57be43a561. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:52:32Z), 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/SE5Q51804050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50687569d58e895ca6e9595d198aba4d832edd8b4e5cc17b480dc34b16b66151. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q51809411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19ac2ac2666018676953edc2f86c494aede471801d6917f7116a39956d2db2d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q51803109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91750a16c61fbff2ac1d8c1cf95b2728c39caecccba21c849a05a76446e0e62c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q51820214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04451b498136bc2ed713d2476e6e5e5a53b3453c33c220af6924b8f698feb2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:28Z), 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/SE5Q51822736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed043e9d781e5dbb9bc593c2c5f8813d107e88fff0028af6f993a2f75fa8c476. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51824599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4be943933f32103eae8aabcc25b49526b1ffd7fb27c1475d126b4bd3aaf06. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5Q51817342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a824260438765d88a4d3d24316e120fe380bd63b6ae21d162a316c8f09e642. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE5Q51821420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2fb32d792946946de0d4a25037d3a9297cdafed4908929ad79ea2cfc14820a. 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/SE5Q51806917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2447ff4ef44798a684e5a5e10449af33c6e65a2d04d7cbe2e71e4d037ebbf596. 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/SE5Q51802119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183ab28f0985b7aed69593c77ef0d4a0752fd061cc606771c7a6fbe6d0cbd89a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE5Q51821162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f3b10948279ec25a3581ec6c7809a99aed3a45ab3b2000e96ecf3dfef77171. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5Q51807301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f70b91dd8d3f920588cc795ba377f31fde6deba7f36f61f6edeba92c8614c. 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/SE5Q51818550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b35212a8e80eae260f3ebfff8e696bfa293febb590e8f0c7135554eeaf59e9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE5Q51809661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf428c48c675a395aed272f511af1e03b62241b0aade83059e988d24718e61b1c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE5Q51825227.