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 0x9b03b323f0bb4c3ec7bf60536a68f7718b745aa0ef17b2643c248063ba3b403f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2dddb93-a8b1-4e89-8cc2-a5374754b479.json and https://artists.proofprofile.net/proofs/artist/f2dddb93-a8b1-4e89-8cc2-a5374754b479.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 0x46a2d3a136da23d1ee430cb0b863015e145bc1367824c898512c4dfb91f13dbf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFG2527444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a196dc8b7883f88fd1101a2f45c08c342eb4060e1188799e407da0f50c409a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:04Z), 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/QZWFH2511274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac3dbcf0b75eaafce5a10c4290d851fcd173090b8beb3ff3b29faf300d3cd74. 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/QZWFH2513761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51089de1ef29c5a42eed52ccf3158d9ba9a99ced571bf5e23314320372426bd. 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/QZWFH2513721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c4f25604dd39085cb296dd4accd7b4868bffab78afd6488f94f82fa23e9148. 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/QZWFH2513724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fbe6ef5131337d6924be5b8e2a6ea2e9343db61c4a21d538bde79ccf7d70ab. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFH2554715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd9cb226514780c4abb832cb3ec83e07ad718e156a7d00c2a20e7878f4c495. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFH2557166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b79fd8b9ba74357747f01d6bcb34096237a581e818aaa3bcfe611c3656cce9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFH2557168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a0dbd11a0c12c7f49df57f33a8812306d121c1301dfebac286cea25adc67f2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFH2557173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0e18cf2d55d0fc37c7c8869edf24008daed43fdcfa989bdace4e70cd5d064. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:53Z), 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/QZWFH2575097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97130a2f273909f43e74808a94dc6b147997930e6211184a222f8172dc465e7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:44Z), 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/QZWFH2572675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb15f5c7076ae2bf66df4f93fa5cc3a85e0ae066455eda56eb3194c39902dfa. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZWFH2575099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e07140f5c2fae975b60af5bbbfecd3c85f32712f212e065d779bee1645d0f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:57Z), 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/QZWFH2575090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a45d4baad14da4cb5cc7814b186566350add6ec7b6fc715367771cc9cf0bd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:56:04Z), 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/QZWFH2557170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9745280cb887295ea70bd1c53046552cde2e66f0db9ce503e90b7bc16053ab. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:47Z), 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/QZWFH2575094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a8c278f1c8c0506cae96e7e576fa72f2ba6632513d51b188c799f206159f85. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:00Z), 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/QZWFJ2513957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269bdef64f898e2fe717cd818f778023f991638a1f95343cc9d2392867cf01a2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFJ2503933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d284210abacc3bd942eed9ed241af09aad320f1b2c9df46d5a08eb21074080. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFJ2513959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e3564cbe2a9087e5ca7f9103f8ea9be0a2a05d82120a191ad938ff8aca06d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:42Z), 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/QZWFJ2503931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa9fabe0b9a4ca03e6f24f16be58121ce2b94d34da31e5797054c0b1c93a73. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:32:38Z), 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/QZWFJ2511313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfc278bffd1e6d475cb2ceecd9f0593b214cca3d1f425b954fb6aba3ce1e29. 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/QZWFJ2503936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deb8385e1a1980b70a1c7b796890cb9443202f22786f98d1b7f27ed02261f24. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFJ2501307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d3202f809ae8b0fd099f3fa2df2a0c9ad0fa7ad8451dc7a22284c8e0708d6b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:22Z), 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/QZWFJ2513956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5237c69213bd54a3bfb3a878eba84fdf9bb2cc515e2025177f982f54f69496. 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/QZWFJ2513979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572ff123d6f23c828effc595f69bc91abbcb9002d0f33fddb9278e9893e63c63. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:03:04Z), 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/QZWFJ2596788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b3d6d8601556dc638ed88c933d9738c0340c715406c133cf12cddf81f9869. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:26Z), 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/QZWFJ2598802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76dac2daf24b894889242c72b300a8245f57c58e73dd697e1b8e42e26069a90. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:58:11Z), 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/QZWFT2539016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfdb1cf04da112098db421820fddcde01eb47b88437eb76427b55393021c864. 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/QZWFT2589873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba1d75bd263a317d02e98210dc70bdc4fdb1fa2ad43b314841a60f3af3ba3f. 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/QZWFT2592542.