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 0xce224dc0b71d2e60aedc7219eeb81847057b1bae39559892169195f2a5fcf902. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8abe56d-ce69-4350-a57e-05e85f6075ae.json and https://artists.proofprofile.net/proofs/artist/b8abe56d-ce69-4350-a57e-05e85f6075ae.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 0xf39fc2fcf5d0d70a6a3fd23c09d90fb2587d5e27eb60cca8587fb8b688e9d505. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:35Z), 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/QZW9K2495818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0c7ad0a35a3295a949b85eeafc91f20e6e4acf41eb6bf6028a1e8a869b294e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9K2495819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3446e169a7e8dd769de8c0121a2c16ea4e861bf17321098e2fcecf7aae46efa. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:43Z), 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/QZW9K2495820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd333595eef2cd5e7af3d7244b515255af11bac07440bf1f2a284e10827a3b0ee. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZW9K2495821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74773bd991c1a3ab1321c62bdb287c7aa25c0e66bb1b18d65db391c9157a2b16. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZW9K2495822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf08372c0a60e47d6de95b59f37983a952a4a7815c1ce90e237d38723369a38. 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/QZW9K2495823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a6ecc01fb1e897159034ed920daa3d9070ce4034927138e512af50269a5684. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZW9K2495824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3feea93b64c3f4616016a089b8b29b1df34b8ac423991baef585d376d2b34. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9K2495825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82deb6cee2a58528e8ca47e493ffd73340bb5bc29add5923668626279ff8c89. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9K2495826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f45d4e77460d326259ff21d250d5d05a97e2e976c96d063600a8a870a409d. 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/QZW9K2495853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73031af3ac620fcc2a076eb3108008cb6b46bdf8318d3bf1682b2fb0e7af1761. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZW9K2495854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bb5b386b19239f4e8820d2f518b3f7c639f8dbdb5224331e5ba636ecaee75. 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/QZW9K2495855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fccc399f6c518ebf7c4192e25cbf17c3e87b6f91508a6fa749dd41297d187. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZW9K2495856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa8547cd3cc08cad6f594ecb59d102521ed16628513e2955c72221dd072e08. 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/QZW9K2495857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda5cc9c8eb112b8c0128f7dc6380b75446e5518afe6ce990f94102a9943e9cf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:35Z), 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/QZW9K2495858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bb1809d0721b66919b4ec7eca037618dce8c4fca58930c4f24c5193c3744ba. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:35:13Z), 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/QZW9K2495859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c385924fe2a00598bd1cc57d7769a116c4ad21e779fc1654a09c8536b66c4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:11Z), 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/QZW9K2495860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b229c1b48dd8875f9a3ed2cc7ead1a5a802c50629decd3b45464df66385dc6e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZW9K2495861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e221e8bb854102e614c287e662febb36ffad78070b6df923e5c2167b6b64636. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZW9K2495862.