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 0x6279f92a68e1e00f8cd0d6b50b2df6ebb6c7914558f695e307609ce81da507f3. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4b9e656-e5d4-4017-973f-6b9b7f47a520.json and https://artists.proofprofile.net/proofs/artist/c4b9e656-e5d4-4017-973f-6b9b7f47a520.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 0x6e936cef64c4fda0f4d976f2b3cc8bf38570c732aab27fc99e2c6499e0cdf8b9. 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/USLZJ2484463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e8e7855ae5d500a7cd51413f4c57a642183d2f9c89d2c9359c5ce95848f5de. 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/GBWUL2478365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee7f09a01e7b321c2ef52a983fffed9ab6c5f7efc023cf1f5f3fd79e741e7f. 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/QZWDE2418438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f62064ca76ad4da7538e164a7497568aef40486143f7ef9abe4f6d45101a829. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ8B2430898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284b1257ca8ff087594d48555a0b7b57c883effb40a87c1d18b0344f61cd451. 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/QZZEB2475611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae1794e31c7546cd6656356962b4e6fff2c78887d1a656ead3b45565d987bfd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZEB2475624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bc2702f56907b80031d7bec292d8023fdd6df4639093fdc91a341e6d5dba7f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZZEB2475630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e771c5b64e81ebb8d46138e47471d1187b3b70ea5a8968f407b9a5a42e8141f. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:46:36Z), 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/QZZEB2475635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe107893351d0ee88bcf30eccc0c16af6b332aee8a517453bb74a88789af56878. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZEB2475637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2710ed88ec885b62d84562b5361fb728a2422884e58c55e6e961c7fd2b6a1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:47:22Z), 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/QZZEB2475639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579067866d0c52e1edb50aa94c0c7511b6d34bb956e459aeb7ec582a7dfe5164. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZEB2475660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c49e5d4dc924acc96022f583ef095c658e334ea1ef342c7ac28f2ac040d7ecf. 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/QZZEB2475665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb7213923a8feaeaaf5550ee982828b8e74f16dc57dc3558af6397e4a5bbf8. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:14:20Z), 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/QZZEB2475683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79072b42f76db0ef552ad2484be17a1931f1bc1e604d3127c55e7d2316e3fa. 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/QZZEB2475686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2533382a843b551040fa7d0085f921f92a31fb97bce7fc5901016702d0bd657. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:10Z), 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/QZZEB2475689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629e106510a32168ba81b234c96885f8be0242290886d923d1450c3ccab3ad2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:59Z), 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/QZZEB2475699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce0e5ba8891ba04c28d6da8f28e3c61ff74d333a3d873f97e55d0c3da67eaee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZEB2475702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3417211ba284e6bd6572145eab5202b21c85b75a654f06e523ede341fea88797. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:12Z), 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/QZZEB2475712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c189da5791b55a3ded71907e31230ab13509d23bef7e200dd8006448e9697. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWDD2545258.