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 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 0x815cf9027730e2156dece2f8c32a6126ccb79a1fc94767ea5789dc64c08eb139. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6babab5-55ae-4f62-8be0-2fec24964d38.json and https://artists.proofprofile.net/proofs/artist/b6babab5-55ae-4f62-8be0-2fec24964d38.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 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 0x593a9ede35d2ab1a3c522f1b5bef21ce2089ecb455a6cf4ef22c3c13be74e1dd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bd28bd726bd09af72a1a6554ce58ccead69b55e572db306636fecc31a542a. 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/BRVWS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30310099f4dc9af7c1e878fc6e6fd0ba02bb5e449912f7c33c7892962b0794c7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRVWS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04549b3a5c1ba181f898d4f8dd25d52f1332510f184e2d306ed59c33b1fe334e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRVWS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6dc65a706cdaac8887a1a60563a53860b0a393b31a4ef25fa86350665ba79a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRVWS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25064b33ea390912b87ec707d761c9fb457d15c8e088ae70c4955336233de07b. 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/BRVWS2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17251c3074673536ada89bc44d36a835f2cec2b3095e5129944a8dfedcfd73fd. 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/BRVWS2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d14136e17a4ae17b081c96da213ac9eb6fbcc5dd49e83105a1fa0ee64fe2a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23135f75f6a35d3bbf1a3b32d5d6c52d1106ab750e80f59aa9f99f1ccc32dfe. 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/BRVWS2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0960b899e2e54819e1e54fb9eceecd7bdcbea0c4d3deed6f82c8fa1d05e26a. 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/BRVWS2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c15055ef82d8791901a9cfeba2779b5012a40f5520ff0ed76b4d3625d5050. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e068c61bd44ff007843757e1d31020779153f2da50d0e32690fcd4eab888559. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19199151f9443295736912ab2a6d8be89a1d76ead0fb2aa55c6ae41285298c7d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRVWS2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecad60328008454c4e0154ea5758917f9464556fd2a3ab0202124c123feaf14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ec58d5dce659c8a371cda10104d31a3bfe4372c46f9894f80b47714c901ab5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BRVWS2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36eaf147ec973e0247099667536f29d14fbd0d403a68074ad7bba288eef5f72. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BRVWS2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e706a95ec79882bad1207d5ab728f456f1cf01a22e9c2c2b211a120abbe9e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRVWS2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23135f75f6a35d3bbf1a3b32d5d6c52d1106ab750e80f59aa9f99f1ccc32dfe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ccdcfdf186c53848b6c372fa4c68049c19d522363b21647c793509b032ba5e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd2fccd089a632bc3766e4bbdeee6231be618deaa8378760044c9549b4a39f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRVWS2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43653616bc52cc864daa3500d0eddb00b8bac1f81083a75c4d8275fecd49dd90. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90feeed1f5028cc908d0e5666bf515166a1c2e45e5f1508d16dbb7d18f4907. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRVWS2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f2c5f745e73919649665f97c45dc96a44e9c5618481b30dd59512c2bfef229. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVWS2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcdacafa25569c9e818612e1f57e21451a2511ae1e76b497ea7deb768289fa. 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/BCGL72200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f336dcbac156550fd85a5458beabc0468becd8d258a6281d99f7962d4bd9c88. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZ5AB1813117.