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 0x1e5658cf096e334f4fa0613a3efbb25728aa45e1103cfed7f6884ae5aba329a1. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c26535b-4101-4830-817b-94c7cf639b71.json and https://artists.proofprofile.net/proofs/artist/6c26535b-4101-4830-817b-94c7cf639b71.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 0x5c492e865560bf0b68018f03ccf4066faf4a0ea61c34d40d7fb51d6ba09b57d9. 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/QZTB22311688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8529dbc9521c3fdb38871ea4248073a03b77b84bec20c7a374170c3ef37180e2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTB22311689.
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 0xf4cdd199fbc0a82f68949a93b5130efc0c4efb4adc11cdbd01abd257faaf30bc. 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/QZES62334319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f16b54b08094f669972d9216b810a1ea06e7c5cc95c6fe9d3b9af00f116e7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES62334315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfc5af3bcf5fe0551c0675990137818d7ee7f63418c18a14ad7ed0aaa98aaae. 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/QZNWT2006878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301d8138323e29f6ae525153720721a42e740e842764757234a99dadad2c178f. 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/QZDA82086556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2f77dd21b93f88b31e01b04d5f77de8e40fc2514a8e64b3060ba32aa1aa386. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZDA82086547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd075de8f723b15b76aab7d7d25171286eda661c9f2731c4c54e6d39196859fee. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA82086553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40716865cb2a635c3b5932def13da50846716e2cd9bcef31288826a20a1fb35a. 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/QZFYW2044510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aa75a8c931d55beba2849652774c33c5558d069c4055abe03b868a28bcc364. 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/QZFYW2044525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b5e73e5709605f88213a3041eeb30c9577dab2a44613a19cd8c4ec41d13796. 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/QZFZ61937720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fddc880a8f43755b7feef55bf33e0c98026964786a258da6f5c066317a0501f. 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/QZES71890171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3e32f14d378d2f155fb3a4bfd6e15150273d5cea5a1efcbf757b770db6069c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES71890167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a28771493245bd18653fd1cc245c3739435cc4f2e6fe8fb5d92b932b335e92. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZES71890168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b7ce66b9f7787f5a57ea361a08ab1886ac06110f65b76bec1af190d6d184b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA71816721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ed789c607602b43b70479b4fc6192ea6db217b0e13e1d75e6ddbeb35081e27. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA71816718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a31403cf26b1e1d4c5dc5faa766d0f3499115cd42805b8026b928dedb5d06e2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZCE61897306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3e36c5535504a92dd1328d8bd97314fb2b00acd6d141dc965f35906bc56c29. 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/QZCE61897311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b807a002829d95f967870a97e7470ad66696a8726e4b9a1ed0bd1d7852a143. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZANL1752865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bfe09f2207e3eaf063c6fc61434124bae647e971b8438a081e6ec1f4da483. 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/QZANL1752873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe94905b85658f957f9e5bba91569e70606948e6efcbaa80c6622a25a04f098. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZANL1752859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae33d55639d0f1145922a9dba6820746a887fef660b4255ff9225a7ef9aaae6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZANL1752862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcbde0d7239f7b7c1f65bee7c4a3bc8118b1499a86d078342226cc4e6a614e0. 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/QZ9Y21721611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a247375f12d4450c75cdf596d29fdbfd7950503eb44085738ab228e473eb0. 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/QZ9Y21721614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd142cf77425988f27767b49a696db4e91c269b717b0f3065dbd3d936d8f3a09e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ9Y21721607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d38c00fab9e23fb73a8c28aa8ec4505efd7580608cc95da5bf8283107b31d6d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZ9Y21721608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b230ac7118f2ad1f83f45ce89ec3f3508dbb7f857490d64e4b2c3549e57064. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZ9Y21721609.