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 0x8e1ce87bee1a49cc6d8cbf537e99cc418e8b4985d3764cb2b8e692b632561841. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1478a1d-a5f0-4d76-ac66-f778a51a36f8.json and https://artists.proofprofile.net/proofs/artist/e1478a1d-a5f0-4d76-ac66-f778a51a36f8.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 0x10cedd4db8e131f934201bf2edf8516341b9c9263f3bfe9ef3d4d246777c2f9f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES03A1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d826720448f6c05fd7527148a4a56eab42d59763aa87c2a567b5e4754f7b9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES03A1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb349905ce5070f4b8549337da111177ebc2bd9e6c708b80538f16458af4ba1ff. 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/ES03A1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ccb56d56b4eb17dd0c5ede9df536fab491fdcd078d59198cb04bfe691807c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATR981163193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be8b2722f14136e8393633226b8cf1993c43c99082d5a4db43683d46f15f178. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ATR981163194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e9d4a43f7c66b9a6a59d52ca59f3e4e321fb2f7be2177571cb27983afeb31d. 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/ATR981163196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd442de67ca25fa3fb25a50ee097a7e1892cecf32a8aca69f6a7b0775eab2d99. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR981163197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af114a24da69f6f068cc087d113c08fd5e65628286c700f0a54be8439ab920. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:35Z), 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/ATR981163198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eafa9b44345d519e15efaece4cc2a80ea4a9d49aa44e37b3158f1de29f8707c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ATR981163203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83339f3312328409e6f5cc85c3e72bdbe9afb6d748ab0e945adc7946242adc29. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES8242284201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754ad2fb27b6dab4848ecdfb9472b27b448e1903c7fbb9c8b9d8545a3a6d181. 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/ES8242284202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa488980a6d31cae4d7784abcbf54fdc64c1b15414198867acdf58096b1ed2608. 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/ES8242284203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d7872dda5738c402ab6e5867be93f904473aa46bebca3250c4619e351d0dc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES8242284204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4daf7915261e5d7ef9bca4e836f6b3219924a79349772651d7811d2d338cf2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES8242284205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae31e9549978744e7cad8abafc959b6fe374f5316e26ed812e46a2a8ae930978. 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/ES8242284206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045b558a64f2d62282ba6cc30b1b357621c39a3649e3798ba1abcdb26134bb5. 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/ES8242284207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f2a1b11f33493d5c3e19d90fbaa83afc67ddb3d9513527b01b1263b34cc13c. 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/ES8242284208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31751ee4c3fd5363f650c5b29236ba9a39013899b814f1fa01b349913aec0592. 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/ES8242284209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115436e0f313535cf5d89bd48d53e678a69269c9c36cdbf12684a40b1b3f39e3. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/ES8242284210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b124a8323e17005996e14c9733ee40b535ae45ed97a62e105b622c645a01dd. 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/ES8242284211.