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 0x8e17d22807a41c33dffc0fe29a8d3775238eaa395866c0d772d054dbb493975c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed6bbb86-6f7b-4bc1-b322-08220af2f89c.json and https://artists.proofprofile.net/proofs/artist/ed6bbb86-6f7b-4bc1-b322-08220af2f89c.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 0x02310b08b68e5affadcc204fde9ee86402d63268e9f38f1b3d059682a6f1b46a. 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/QZFZ42407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be9eec6c5a1492a40a065b881c8cdb8caa5bc988ba130e05d3dc7b445ae9bd1. 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/QZFZ42407542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4570ecc8a9fb46dbd2abcfd8d3033f7fecca0be9c2bf562f53c2fd3959d78. 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/QZFZ42407543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde294bcf4d1ed20b0b0266f9ab2565ba5501f16183a1ae6bc3a504d56845f6d0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFZ42407544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d67c7439f326e574811fdefe01e2f67d6f12112a78e694fc952993bbf696cc. 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/QZFZ42407545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa899f6e442d4bef5de3d7c7ab9789ed5866b07a3581851cba10ab285b0e9a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFZ62410237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a8340d98046a6e7104cb19171dbd924a5ae269ea731f506e4a46e1ee29406. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:32Z), 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/QZFZ62410240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6773fa7051cb0c181bb2accead5ee01841048941fd4d54808a066fd281e748ad. 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/QZFZ62410241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c7042d38e3b2107ad3e7bfe3cc8940ca536138a5bff2ae585711b22a2ee32. 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/QZFZ62410242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d92abe19bd443939b9e93c8421ed59e1e55ac268558e008f08b79f4a272309c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZFZ62410243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaec653dc0f05fcaaea4fe6c49a000223e4a1804214a6dd70076a7896b2ad691. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62410245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a09eda2686eaf996d19a5f503f5d1c60601d59b8895a9e3c1487df442f94c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZPLS2444076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4246e3b99465b1c175ebdce65a5a2762106dfac3fa7a71ede8e45eb66fc0a0bc. 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/QZPLS2444077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1e144313127f028d8f08a814a94f394b039aded40dafd70ea3a18ccfdc701e. 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/QZPLS2444079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc57178fae9bac38769afb0c3a865200780dc8b7cc64ca4bd4195a507c6765d5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:45Z), 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/QZPLS2444080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779062203a791e5b73cd2941da297a505506eb07682ce70330def2c39ddbf43. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:19Z), 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/QZPLS2444081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc4b690915b6157ec96e71b9a81408f64a4d65acacb59106a3c8815f156023e. 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/QZPLS2444088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8c7705b58662f6c51c6ac84a74465adc34e83c5aa2f46b8c6f531304fc538a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPLS2444089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f1850a15682f43207dcaa93e610a56716b3cdb5a243a78f41cbea1ee846e2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZPLS2444090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6220d83cc82472009633dc4aeafc4a9902f3c3b8ddc85907e77559407070c1. 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/QZPLS2444091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33485b234688d88e2d57596fea5d8d7379f3c4572baca70589694e6024a27497. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZRP42435186.