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 0xd74e69a3b0d5914fa1ab51b56d7a9f8a0657f4c2c51603fd8c674ee44e7893d4. 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/1c9ca163-a9ee-4598-a289-069ddf4efd66.json and https://artists.proofprofile.net/proofs/artist/1c9ca163-a9ee-4598-a289-069ddf4efd66.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 0xb04c757b1439047ac0eaea124ac3b4065ac995ef4957beea1d45274f03b9e285. 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/TWAE31600885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4017043a011bd33ddb50a85fefe3a9a3689c5fcab677083f6dbe7036ca93e509. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TWZ471400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd1f7505e0031be8ca6cce4285ece0c81b524eee04f0ae235477f7254137d6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TWAE31500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff7571171cb7eedf4085e686c378a36b118a7629b00e001481e11ef9e3f9082. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TWAE31500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6099f13f381b1d1b3c1bee55087113c15c433b1721d093137780af206e5abf. 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/TWAE31500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6243993c48a823df656c444221418e12e21aea7f74113b51a79f533f4a2fc4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAE31701673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1301ebc54fa0a9eb6bddb0b0a83d90c4525cb61824fbc6c18cdd9682a101a241. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TWAE31701675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1fed9784e0f49279d6b03044fd669c7c401c954efb923f418a4500f606415b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TWBF32210017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caece8227f09cd2e89d223a8c1b0088e8b95d0b908f8c18df9704ca0b2c17bf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:11:00Z), 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/TWBF32210020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02702ed7ba7ed61c8e994609bb63a7ca9653cfbe882ab3c8c6d66b85307e18b9. 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/TWBF32408007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699fc778c49cfbbb4222080af435da77706385aafa83e08a173b193339606940. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TWBF32509002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d044211d7bec92c530f0d3331735014d40108230041ef9b00bbb8d6fd906d85. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:18Z), 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/TWBF32509003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405448bab96043340ad58baa032efb13d44ead93729eee00f0d9af11a9276260. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TWBF32509004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb375d68b2cfb615bbad814aaf98430076e430f3dc79a7b403a62ff96412b65. 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/TWBF32509005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd4d077cee98a7863f898c6aa1ffe0f2451f916dc421dc186453ffe0147b07e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:14Z), 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/TWBF32509006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32442d0e83b9683ce8d26f822dc93d235c0f82779a9231e637fb2d2dc29c5dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWBF32509007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1588e43e4677efb3bba63eda6297035c63fcd158e2b8ecc0a4ee2d3d7ccbdaf9. 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/TWBF32509008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4134419998730a4f436383ec257c45765706c02b3f2bd0a1e3d6024e5b338d8. 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/TWBF32509009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58dbf8917bc4aa0d5e6d1411aed22b4e1939c589ae6abc7ecf88b7c1851ee63. 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/TWBF32509010.