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 0x1740a01dbec1b8292d2a0a4bcb0aebb3c52848e4a04c3f13fb66499a8afaced6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3f4941c-257e-4116-958d-2ef85074e968.json and https://artists.proofprofile.net/proofs/artist/f3f4941c-257e-4116-958d-2ef85074e968.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 0xe9f516dc2a0034e09a55e9f69ec81be781762b70459feef69a0b59e0a365c20b. 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/QZS7J2229060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94664b54150b9b9e1ed42b4034bbbb638ad28f30c7c5874de554fe5e6bfc5e4. 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/QZMEP2419851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10665ac229ad649c53b0cbbd2104fa0e673c49f314bd1edc65064d4f0b6d121. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHT2329752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354776d47336312e355e23a2ebd6c7b10174d005033ac256017483e43ab748f2. 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/TCAHS2330097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45538d62b42c7d63d5d11dc638a8b3802d6a078e6c27fcd4324030725416bd70. 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/TCAJF2518655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d3fd6e6f88dc3d2d3808190af9a30a34d196f42c89d7eed961afa4830f06f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAJD2479397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5696735a955d29ca378a568b75ca57d2c44411d17fd9580f2b3ef2be604d2c7. 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/TCAIK2467287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f20f4050e54b948983b111f7a544aec8964d15fec321f35ddb5c2f7f2a05b. 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/TCAIJ2473676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8c0e8637adee8bb6fc7a5561275190dff96287e4d846fa2d47abde0991a166. 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/TCAHT2482816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10665ac229ad649c53b0cbbd2104fa0e673c49f314bd1edc65064d4f0b6d121. 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/TCAHT2329752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0e36b7d348cb3b8795063719e0d58cd7e6f76cb60b8c5be4c865b4a9305332. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:09:51Z), 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/QZWFH2335549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc23d8a8702120f1d5a77e657d18d654b22eb75bf4d7e83c4e7e3ac22a45b94. 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/TCAHI2388369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da5d9333610a0f2814fd560bd797f1b2ed2b47ff91030f2e8e0181d563f5895. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGJ2241470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65de755657539edc71dae44ebb2b1965691a2885d61bbcfff21e40f40014167. 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/QZHN62398228.