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 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 0x028be1054695bdf611d246025816536001dfbfd0fd465a1ab45702b5a87c9d23. 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/7f3da4ac-da16-4416-b77d-6863528f4c95.json and https://artists.proofprofile.net/proofs/artist/7f3da4ac-da16-4416-b77d-6863528f4c95.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 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 0x2a935ebb8d06e1527f89958a3bafd0c0bad3073e3de4c5fb470d6d474651083d. 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/QZHNC2076722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb3c1cab042e2ab797be8befede2948d2716ed410ef51ab6407013cd00b9de. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6N2019310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c61b1a3bc1addbd78bbed1af60add95717aea906ddd101f9cf5806f8822f827. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZNWQ2179992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ddc6f1295b60161d3db1a3896c48caabb44c750e15cf081b42f56180584e8. 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/QZNWX2129308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a9342ff5e05ff19073ec4debfb9027b396ecdceeb1a4e5471232be30e88f41. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNC2261251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c557e15a54ac1f91e5e5dc8910c0814ed7dc4a143042cc829dcf2465dea11c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP52374516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04338aabdc33d1f66ece9f99e50a19ae2866150ccf540e5c71ea64eaae26b5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTBD2383495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3531c6b9f90321cc74ded6d341dc2ea4a4bcbce81f2aaba8754318d2cf33853d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22492504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf49a38b0d506982742c6a272812f5f1eb9a2b336d6beac2678a7e110a58ec51. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZES62470997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3531c6b9f90321cc74ded6d341dc2ea4a4bcbce81f2aaba8754318d2cf33853d. 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/QZFZ22492504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04338aabdc33d1f66ece9f99e50a19ae2866150ccf540e5c71ea64eaae26b5. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTBD2383495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf49a38b0d506982742c6a272812f5f1eb9a2b336d6beac2678a7e110a58ec51. 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/QZES62470997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff18fcbc1a13c493bb870d0564d93d9fcf9265421a77c671da7a3be4b21e5ce. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6H2368290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca891e15cf0b12be73aa76e326867697ddd590385e11388491f67f94f87da7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72322165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7437177b848a3bc88cb4f0837a3773b166145a11c11b7866551f6b119ef25bc. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN92411582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07522ea11c545883b2c71f7768ab75005df187b3910f7c612aaf1e7bac409218. 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/QZMEP2384599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c541bc0387b370d318fb5c97f886cf6948f426017c4fd9ba4d9f9a643856bd3. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZNWW2219643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d2da4de06aa2952615f339a549c0c09dacd6d208c974cec19b02e8956687d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNWR2410293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a68e01ba2bcec9309c99c43ee09d012a9f4e829f4d8b7be0a347c3485e52e30. 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/QZNWV2411796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d2da4de06aa2952615f339a549c0c09dacd6d208c974cec19b02e8956687d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWR2410293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556d325af24ddd2870a6cd5ef6fc3558d57c3b809b98b87c367abce4de8f00d6. 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/QZTAS2477120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b92de094ad6b69b88c9f318ce160fd285868d68a258c2b4b732023236a56e9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTBF2473442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd6e489e9a76e5b0433a3b6030473aa957e45a67e97df0aa277ea17bf60910. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFS2421150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc218349fd5bd7cee5e4d862e6e49a71c232847eeaca4bdc19c4040f8e2d0f973. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6L2511599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddbfd9570ef1ca71a17cc271fc5d1c71ee580545df29c6081a4d0fed0c61b6d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2511600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c557e15a54ac1f91e5e5dc8910c0814ed7dc4a143042cc829dcf2465dea11c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZRP52374516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3531c6b9f90321cc74ded6d341dc2ea4a4bcbce81f2aaba8754318d2cf33853d. 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/QZFZ22492504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04338aabdc33d1f66ece9f99e50a19ae2866150ccf540e5c71ea64eaae26b5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZTBD2383495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46def1d23e02596ce8242793a5dfd3a22ba494c9792b040024b7dc5e889b884. 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/QZHNC2265919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a9d208d436d869f0997bc97349a94dc3bcad67358fa5181b1ee747c7306de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2227045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9408a2b75ab7b69348033e35caf1f972a3f417d5ecdc0fb26dd36cd817a111b0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZES72328925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336217eb5fe30b1ab1d42241a5f57f7a53f93a306587f8aaaf8536bb4a3e05d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7W2402751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43df99016309532a667b8902bc5494a203b88ad73e92a85b4b4b0d3dec96ea7e. 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/QZTAZ2568266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d2da4de06aa2952615f339a549c0c09dacd6d208c974cec19b02e8956687d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWR2410293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46828c4951eec11335f3b43c498c938b5cad3cd689233a6dfe96383a8b9b0211. 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/QZWFQ2574273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937a7c08ccc6009e6ec1c30a2bd31d6831fd328c215df4718305bf501b29c5b. 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/QZTGW2401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937a7c08ccc6009e6ec1c30a2bd31d6831fd328c215df4718305bf501b29c5b. 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/QZTGW2401205.