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 0x4946fc218735ce393241b7903ef8c405a7df2ad6ebda07fabd92b3538f77db94. 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/39b4a49b-28d8-43e5-ba1c-67c53c74a3b8.json and https://artists.proofprofile.net/proofs/artist/39b4a49b-28d8-43e5-ba1c-67c53c74a3b8.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 0x343458a4d87843b184c0cb0021507f1d7719ba69a7a90007ed08d480e3a9ef12. 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/US39K1617601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccb4b3214925026b5790fa0d634e913d83dc9367de1e1d29b86a95191252ef4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US39K1617602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33884b0f06dbdb764c304f77691f4dc542f7e94a715aff5128417e8600eda0. 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/US39K1617604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5fc011eacd201910fe21369b29488efff56842ed1990b80cdf0eae4730fccd. 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/US39K1617605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e33fce8b98f443dbea290354f3bba6e3e803edecffc421e1e460d92aac0645b. 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/US39K1617607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03729cddac4077b5fd41e0d337a3fb3b9dec3f52e75fc87922df264252b82cae. 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/QM6DC1869462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f00f6000bc28361129235646e64f1e4282f6e98ce3cc56af03962ddbe46dd4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:24Z), 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/QM6DC1869465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5d6362063ca2738a2139e961ae7898c94b8dcf1457327998c5e9f91bfe5b6. 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/QM6DC1869466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af7b6b79348edf256cd453eb4c23bd9caf79fe10bb5b630649225ed8e3b824a. 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/QM6DC1869471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b31f3301addd663086f8181f1a72c67a665c428039414ae9c0f4f462c6e7036. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US39K2114402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1faee7e70ec3c51a2d8d5c8d1f2697a9c0972c61c2b07d16a71c3dc895b58a7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:32:42Z), 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/US39K1800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6239e2af7d739db9206ed047ba2f7df6d7e5c9f1bc728c730e1856895f0197. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/US39K1800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2097b7c5d84f02e73455c22df7f46ba3f3b0bd8f10a3c79ff5b0767c6a292b3. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/US39K1800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a150e721063526c07cd290194b86365fd4c29e5cf53f732ec1c7fb349543e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US39K1800608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ec7fc3429e20c91ca3a493fcb3f82b930abb2d84d9110d05fc06279b9a8377. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/US39K2062001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d90c93789aa626825ae8eed352242b832532fc997b81ed52f07478fe248ab1. 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/TCAGM2256613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c5921758f4b76047743823f550400ce86254ee5ecb8fec0dccd1a40e6c668. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:53Z), 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/TCAGM2256628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941daebdcc6818fd6a8e4381ba7d54f78c6414e108adbe39ddd26f85570b8382. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAGM2256641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144ff8b129515248d8930c8a6f131d90e570dfcd9c05ebe8deac7b5e2df023d6. 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/QZDQH2353793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0df3cbbf8a977c24eb36f10b12b24351b3c351a25e3fd0fe313c5f40ecce6b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDQH2362000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e3d8d517049effeb16c1f9883b0967cfb2202f04ee0ff7fef44b805f57c4db. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:20:46Z), 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/QZDQH2363113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a274183fb5bd171cf44b9a113a35c6b341cc951479c496ec509ebd962ca5026. 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/QZDQH2366604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e72c0686d5ff851d53915804d6979cdc63ae5577d9713ca8f16453c14c2fe9. 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/US39K2409201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b29f7eaaec92f28796696503256ced7d292513a27c06679c66a9f82110b19. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDQH2443872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11d203f18009944ed32efe5be8affc9eee88fa125c57c4b74f0b75a17d62499. 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/QZDQH2445071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5c15b2b9431fab45950414bd77256c7b954d0b91668b12308272cb0f21eea. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:03Z), 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/QZDQH2384917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6e7efa69d614f1f797dac52b672b445e0f8ecb0ac8dfd6222b01e63a2f8973. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDQH2525703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ea2915a5ffd7e108389767b0dad4cbe4477f8b739220cda4336637eaf7492. 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/QZDQH2532204.