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 0x4fed72b9c14c0e0d5f643bf93899c4cddf384a9fa533aedaf6d333ee3dd7e48b. 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/05e515f4-b2da-4ffc-8404-c449cf3bff9c.json and https://artists.proofprofile.net/proofs/artist/05e515f4-b2da-4ffc-8404-c449cf3bff9c.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 0x340aef13c5b6acced6dd2a72c082cb9e5e97c219b1bba0141b984eafa1e6ce8f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6N2242909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4625a3498cbb2dc592f515194c1354e6c598f8dde0ac3833601f720e3a934. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMEM2213512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378de05288c01c4f24a1c899b2a76021869e801bae3c16ce169e0832e39599e2. 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/QZES92333390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6d90a194cd85bcd69d9cfea03d70f2ce755fed33f05ac9fd92c5d60c72b18a. 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/QZTB62378323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3d658d119a252e3ac033f39f3057376e5f1eab1d784d91a44aed2bd66ca89b. 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/QZMHN2269885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2b7ac3cee084b455eacd71111bbefd91771b6025a1fc17b79cff8b4fbd63f8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZPLR2479128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78409557414710c462a69d8c74422962ee4fb763722fba8cfff832379dd67ca9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:15Z), 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/QZWFF2497972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c611cffd3e2f66ea09de72c0a5009a784a28de7f1ba36de64ad46f8dfd6350d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7R2445163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddb2488dc1a007e578b66c995cd731d16d4bc4a0ddec2a0580f46168904638b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:28Z), 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/QZHN62565261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba62e718ee3004c30dceb992fea290b16b66b5bf4435cf3521ebd116ce840c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6SA2502720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6b01f406f236b53abf846727b88e1b42ae1643c5183d780d1131e4e83f3ea. 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/SE6XX2348016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ceaf3889d23d007e01c66e0d9c14fd61071c1a2dd298787e802b13b66de46. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE62M2391966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e556d54500baa33ea4d8345cdfb9093e9c83e83e72c6921a8ae2aebc372417. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE66N2307667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f4c0d36a807da2f029932cf0b55ba6e3317da2f4476deffa01a30a6bbd6e32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6XX2321957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3abfec9e729277fd7788d4e3c50178a930ba99c32523f85ef9f0320a778ed31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6A92397594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31900686b3655ef4bfebf208b4ec71844620e8680efc209311885fc9ede6bc1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6XY2357417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64320cb851cc6641c23e7992d6e849148b96ccf15d59adec44d063277583f112. 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/SE6A92380344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e556d54500baa33ea4d8345cdfb9093e9c83e83e72c6921a8ae2aebc372417. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE66N2307667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd04008946d6032b9cbfc87ef8c6fccfe2482b09b51e9d363a6928fce41f3c8e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHK2352379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14dd9dcbd7eb60714d808f97bfaa87f27eb838245591654e2c808401108a774. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SE6XX2312906.
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 0x69c08c93a9a1fe0a17753540fb763f81dea63b37495a52715b1012727f05d77a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTB52379249.