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 0x2c77881fa66aa6a22915b11c8b654453657cdc8715d2898a488ab87cff37261b. 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/da90f023-403f-4dd2-a2f4-a6d9662063e4.json and https://artists.proofprofile.net/proofs/artist/da90f023-403f-4dd2-a2f4-a6d9662063e4.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 0xfce3853f0b25276ac0feab3728648f5f37b4f7fc540dabd75d6afaaa8421f63d. 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/QZTPX2436146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d94c1f40233827f567eb363da6e7e40901e72b0679e93f339d56c5ea87170. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZTPX2436123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942ec1a12e5a2cd6f91730c1a74c028b6f94ba13bf0f9c4729e01b592d87c3c. 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/QZTPX2436125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f687908c393a41c90d1b0c5e77839282dc642805654051b356c6cc0621ad03. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTPX2436126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a603e7cf5ca2d7019eca9bfc5fb8a5f5e5ac3603e6769eb5753e81bcf54dc8. 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/QZTPX2436127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d23f31bd11d868514ad387e906e6c8725b1f60cfc2d5f85e31af3e9499f3f. 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/QZTPX2436128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35756a710a874eb1a01638b1c4a4110ecd74ae326da1a6ea2743349ebcc3c9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:36Z), 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/QZTPX2436130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf300c4c675621e130e18cc38663d2da95130dac9dadcddb181083b16cea378. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTPX2442331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4365d52bae2bab34f8b6eb7401641d12e336c2b22d49362b248fb4951ab84ab2. 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/QZTPX2442332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5103381c4363e2f58af0cc2e8ade683928ed36e5828918dc4deca476629a6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTPX2442334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b09c3e50635cda491e1f1dcac0bc405043ab46d1e1bb99f8c9fc66f1d9ba2f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:06:08Z), 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/QZTPX2442336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad77ddf96194405f7ad32c4ece1ad4d62761fc9516de4536ff2f6d5ac9739c52. 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/QZTPX2446834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008ed5a29ea3142179dfc2d89bca2d9e5b7850d7d53354d80b3530936318c876. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTPX2446835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190afda7a4d365e8992e077c943ed4d7701b8c0df39040960b911dfd77c5fc7c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZTPX2446836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf614e65fe1324ae33c8d436293bb6fcaeaf78c4b26ee6c4fc28950cc0835e851. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2449047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb83b930c05a0ade8d3d24e746b5ec3ca041bc06575ac9c502a5281781a5673. 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/QZTPX2449049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f700c8748bceb1076c6f2862a9287a1096652d72441820532f35f9224b827. 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/QZTPX2448440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435e2453da8b7071b324d5d772e283769d4d1fc2e4b7fadd72abf9b7bc651818. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTPX2448441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f7457ce39321629c48ffb4214ab0ba95df88f330d7878fd4afe907d5afc775. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTPX2448443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8759b02f837213f695984c9d4ba82dd0c2776fa3e6fda8009c01e7c3bd49e2aa. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:45Z), 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/QZTPX2448444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a9ca083069949a79461926553f4811444a3d728967d65896c3e68f5e257d3f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTPX2483805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5982172fbc9ae0a3b7f8e3adbf5734d58a5e6d3ac9a7be60cd0caf50649d24. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:52:10Z), 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/QZTPX2483913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d34919e3084b0084bc735f6f74e07ff1fd86abfd3c7275b7da61f7375734c2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTPX2483915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad774c13717fb35032b72b70fb54a6e65e7fd7f8994d3dee666caaedc156407. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTPX2483917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ad18b0153e8ce62610499de97283169359abba90e5c2fccd1d5efa883adc4a. 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/QZTPX2483846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedaf2b29648699006302f3bf8e127da9bd4be7deb672288a1776c6ce777e64. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTPX2483848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6437ca517fffaadb28eb2724b32001420cbb419441937146ed8c01edaf77ac47. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTPX2483795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7a8c85fb48e55bd2306ce61cb9c1f9bd80e6e11a88e703a544090835c5528. 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/QZTPX2483796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2876ba268871d51c98c642b573b4baaa9acb82dff8f69ecfde0a82efe93bad1c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTPX2483798.