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 0x8755dd1b4187695a6a7d5b6aeb498d09fa1cc28f1c4bc2c6113461437f94ea0a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e85cd210-0fd3-4e92-9f1d-0fa3707eb674.json and https://artists.proofprofile.net/proofs/artist/e85cd210-0fd3-4e92-9f1d-0fa3707eb674.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 0xc176356e8436e656b3fe0cd14b390a78ddcd6ff275ba76483ae075df52dafe14. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ8A2527470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3002129c8cd73e430fdeb05d1f4100ba6510e1fb386d23ad246c346248f3f0. 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/QZZ8A2527481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed5a0b40ac0241fd2271638d0c4a6b5548ec7b601adc4fdcac57c107f6b6dc7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:18Z), 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/QZZ8A2527493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8b171b5e5bcb4384d40bc591a6c3d730e02a12f7f54b41a691515f0c487295. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8A2527499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b4f0b9bb774d4c08ebcaa1245dc05d2b81de5f70d800ef47993fe9a82657b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:43Z), 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/QZZ8A2527511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ca27e702e78b2359c962347062f3381b1437134f5848af1c444bb220ac131d. 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/QZZ8A2527518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e66824465c9db894bac8f68dd46938c479d9ccbf3cf1f1dc19ef3995ae4d545. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:48Z), 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/QZZ8A2527525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a2d28efee7de5cfe119901ee2b33a7e72c0d0155fac1721743ced605b71b36. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:07Z), 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/QZZ8A2527529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4596622ec4017752dd106b87ea48e5237bf5d7e4e3640885d481d45a243a5cd1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:06Z), 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/QZZ8A2527532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6104ae049af078517203a1fb2e74e7d95482ee48d5f5cd6d27099977034e55b1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ8A2527537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8352f7c5a831d1b089b51d59815835515cd6519e0028a8ebef3a017f4e484a8. 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/QZZ8A2527548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ddcf6558c327fdea05418c85374a2280ecf208446a6085d42877a3c4c7773. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ8A2527553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9971d881ff76d8850b9a0db6417b5bc95d3776cf6b4de51c325c57e1b072ecc5. 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/QZZ8A2527556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b6dc58a7040a562a1208938b1d0cf0224fa9eecdc60bb040dbcbfc1799dd6c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8A2527559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd87fbb80a43e9cf1cf182711ce831c547096d50869d9f19ed70db2b6f21d84. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ8A2570844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6c881976587759d264cc823234c4f7487b225b12031ff826e4bb50da1adb5f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ8A2570846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ea7ec7539424107386cda5e667c1b023c4586ce0d5978e83d697a7f61b18c. 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/QZZ8A2570848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78459acb754856d7af9ab81fb1a596af82c8616f5380b3ddcad0964719f15aa9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2570849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ccf1537ecfd6674fe0e46bd86a29cc1d6d0b652e7dd182a86ea85e35dde36b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2570851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987feb9de3b3b135383e02d013e329818cd28f3fd25f3c40bdd90232a265d474. 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/QZZ8A2570855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8420e08c624426f35616aae5fcd2e4da7fcbf2a573e0a7f0d9e06fbcc300a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2570856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6935854bf5df8bf4af5ae97171efb451374d004bf9c08872c94c213e91eba4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2570857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a64a447ad6475897642d9a4d9810d87cf45220cb255a23fb945f66fdcbc69. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ8A2573771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ee0b6cc25b784cd1812435a27d52f83436d6d47cc2b028baff306b0b581677. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2573773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506bd9f52d85be10631efbd04bfb2260eef1ec76bbc2659e2c9046b56c91a7f. 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/QZZ8A2573776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1544886da31ffeaf0b3e164fcd6b7387b43d4e8bdfa570b6394b9deeac5b38a2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2573778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92daf9ff8eddca05bcc89e82fc461b34120a8a839a6cd5b3aebc65f575c0b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ8A2573779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c23d6adc148c00fd930c25d9eb061d9d593e73ab01b6fd9df7af045b61eb4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ8A2573781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec297a9600276f75778c8cd2a94ca27891d8f5e8cf73b2f6b25e2fffaed111f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2573785.