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 0x71dd5a36afa2e0dc4dc386c9854e331cbe677b9beabfca861bc3b23a02cfb1db. 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/0831134b-63b0-4582-adf4-2af0c6c5cb4b.json and https://artists.proofprofile.net/proofs/artist/0831134b-63b0-4582-adf4-2af0c6c5cb4b.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 0xfaacc575ba86f35d7aa88c9fd42241fea81c7ba46eaee0c879eb82d5550e8cfa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6F2294736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36813fc0feb491c24bb44d2e5c301996f48f5f02952541cabf5b2b4644cd6f2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:37:35Z), 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/QZK6F2294738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05817217af3ee99df33a450493fc06a61aa66e61c0b07c038268c3354224058a. 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/QZK6F2294739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de663cfdfb3f34bce445c4ba6ccb4ebe6f00e83b1c2b5db9fba09ffa2e02d09. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6F2294740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c80c3771d30583d5098140ffc64505c351dc00aaab6ada091e92b1bfdacaa1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:53Z), 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/QZK6F2294741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427e1d9359da8607e55282e3a5f6c45fcec61d82898422c3f56740a345b4543. 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/QZK6F2294742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015af415e1beef75ec5dc1725c16712341bc96f3524c5c75f223dea8bee7c5f0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:35Z), 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/QZK6F2294743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e19c6ad70af6a1feaa398a3bf8fb5f9342d534f9da4355828ba47108cc130. 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/QZK6F2294744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f798a3acc6a082aa0a525ea0599b9ac5542209dd51ac3dc264c899c21424218. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:05:58Z), 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/QZK6F2294745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78750478918e1f7915143cc0c4aa120a0c6895f71ba9fb87443e77744c69709. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZK6F2294746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7ddc0119a152fc75a731bcdc519c09d259870acdeb3393bf9358c8d3f29d83. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWR2258685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e803ca07f1a89cddb3ddc6794f08807d856607a58bdf46eedf354e59894ab5d. 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/QZNWR2258687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c272ad97e011791843e0a1b7dd12578e62ef86d92917a88c4bf39c890cb77f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:35Z), 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/QZNWR2258689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843cdf321fc5cb317f914bd9e69e9ac0575ab37893b3f02f2cedf646914a9bb1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:58Z), 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/QZNWR2258691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb77c2e13f0f22cd9b0ca0afc60551a4cf36cd1f5c0962b2301d34a63101edf. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWR2258692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326e11cf1778c001dc53debcfc0ddba9b8680942e94e63dc5d195fb114429e3. 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/QZNWR2258693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1876c464ec1c5eee1ab49a58d3b2e2b15a2813f4a88b418c5ef05f95ec1d4. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNWR2258696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb695aace6d483829af920e53397c8a095277a73a4c1c0e18acfb12f6bd362e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB32373334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c395fcdd9cdbfe75f4fd49ecb9e237ff55a67df99c2604fccea68832696ba. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:39Z), 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/QZWFL2314611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a993abbd5a02314a2f44e9e9903cfa232218a2a66547a134b199832b95a435b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYZ2457794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c50ed8098c488b4ab8e13f5698bb2fb139b755ce4c9f1628a0a471acb9a9fe. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:50Z), 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/QZTAU2469032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ea43f58b8d70d53fcb11a5490667ab3c7b6b7f8c5ed95b37c94cf96456d8f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTAU2469035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d8a3080b935c1f0a46e889aaa4f9854d4310741d6d071c5643f9780c7d3ac3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFS2419199.