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 0xd7ceac745f60876dd5f9d85b97dc4c7ba12e3118ad35e792df0728735cc2a4bc. 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/cef99aa5-7a70-424c-8f31-e23117253271.json and https://artists.proofprofile.net/proofs/artist/cef99aa5-7a70-424c-8f31-e23117253271.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 0x7a26114ee414ec12b9df3e935422664f716edb563b83ce2b79d8d2138ed692d6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:31:53Z), 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/TCABX1488253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553c4f0e2e38c09ca7c9619a1ece3fa16fa742b1cc80d8610f2d6fe1bd7372c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCABX1488259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f16acb7b390fface50390f8f57ca614fb0fd93b323634d85164649d46c9c604. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:27:09Z), 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/TCABX1488262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7e8786b2272f091701747499352897cda1e66c221896eacd8998c2a5055ed. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:06:09Z), 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/MYIT11500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66d099739cb54e22b7f620c997033c3d7eb0f15e530aaada2ffaf3ae8f3978. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/MYIT11500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf509acfb877601f4c5f5f0bf96cc5d8f9e1c0a830ddf749e3b8bcc188b67bf4. 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/MYIT11500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a3f7e6238b14725760a390fa99522ce3e904772c992378a90dbe48979e715b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:56Z), 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/MYIT11500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ee85ac934537fe9103e29dd6e797d7e1217aa2a57b5757a8a7c842e5aac9c. 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/MYSX32010007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98af9584c323b39c833570c6673412c176eeafddc443ebbf0f45a1e54597e91. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:54:36Z), 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/MYSX32010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388cc480746a5053581e981aa1ee26369c409d1dcd9ddaef7d626a585ede33d. 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/MYSX32010006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98af9584c323b39c833570c6673412c176eeafddc443ebbf0f45a1e54597e91. 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/MYSX32010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa1bffee17dd17ae12c4eb00dd6995a08c154f7e86ac270c28f7d9ca6de8ff6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:02:43Z), 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/MYSX32210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe0f482c37b037315a794eb76c3241330b96fab5426d64dc3949befe342fbd. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:42:33Z), 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/MYSX32310005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a85f2f13a47ea8cc164e40e62a477c39f0b464ab9672430a9cf456c12ab5db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYTP11700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5a60ddca1a13d6ec0a53c89f2a1ff12f1488cc989308391fa519a730aed00. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYSN12300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa55f61a1bd0bd6e46aff5eabf26f47b612189a361aa83df9b0b77fe33b251c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCABX1488257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a07befac099960507e145340c4fb46de2e39ef6448568bf938a927098ae65d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYIT11500431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0fa51f1a1f8af59de33e3c8ac607e892e5c33e675a7714e85c44c16aa1087f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYIT11500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a85f2f13a47ea8cc164e40e62a477c39f0b464ab9672430a9cf456c12ab5db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYTP11700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0a7995d999e597dd2fce1d161479b13cd7491628b904bea06bd5ed5c57939b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYIT12400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7925be611f2e7cd1b82f5ca70f8be3dca86864e0fe0b5e6d5325308d1f721653. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYIT12400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a4da04bbec1beee79ffa47c2e4352f27b581f7d444029f8fac33f80d503b73. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYIT12300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb860d3b4191c7a71364ed6a16dcd4f24f32293191b4ad241964d80fac0bd0895. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/MYIT12100046.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673d1ee0dde35d6cce84b6df66a2f7fa89530c68ff1c6cdcbb25f0a5e197e405. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/MYIT12300270.