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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 0xca5b1ff02091b6f328d33b23709802df61145f1d38b54811559171e9300e871a. 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/fe51145f-db72-4dc0-ba87-5bc5a176c6ba.json and https://artists.proofprofile.net/proofs/artist/fe51145f-db72-4dc0-ba87-5bc5a176c6ba.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 0xbc430ee0aa7448656efc0d5e1ffc8833362805a5b06a007ab5e5f3b50fe348e6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PTES10000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900cd5ae5122149ba4fa742330ece5e2c59e9751348c7bcab799bcda4482fb7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PTES10000712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3866d2db8bafe6c79dc94d6f143534bd4f2de627f4873c991b920755cd48b00. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:34:14Z), 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/PTES10203311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a927abcfac65985ea9a890212ba018caafd71d6871309489080eb3d99ea09c1. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:31:21Z), 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/PTES10403503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e5be3904622da8df12d24175468a60d6f08eed4f822da51a900a341aae120b. 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/PTES10503514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3174027f76fc4dab8a315a43ad9a965faf819685287356047adbca0288765a. 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/PTES10602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e545e76b4dadf99b8cb91abee0f6cceb6cc11ccfa9b72100c49af7708ed6df. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PTES10703402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7cbbde6942717a592ad39d043ce02ef203f4aacbe9b9769031da8e1bb1daf7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:00:51Z), 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/PTES10703403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b688f6b10d5a342c208d2a658056eb7d320b3a93575b8509c3071ace69d5c. 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/PTES10905501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c42188e8e3afe5160997a68b229b5750ee72e39fef1fd3857e81572a6dc33. 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/PTES10905505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445dbc75320a99a4cc83879d2103d53f8bc528e522386ba48ddc4bfffb06c5b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PTES11104702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f9c1e9e0370eb3aa74f7fe8db6c16cb309ccba8b3c8db7df0923b2ee72e1a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PTES11104703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecdd5fb272a0da4598e2d7f562bc51a1e3143d6dd42c75e9907e18dc9f2e862. 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/PTES11304501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f12e043c8f3e2a429fb01df76f9c8936caa2c7d57f79c1332627450914fb19. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PTES11304502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e579a52c46289831abefa8109fe19705c8c6bc05f269e23931bc8df55bfadf4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PTES11304510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f10ff5fb8a8d33d19127dc64e0cd56613ad3fdd7cb5ab91345ff9c8257ef45c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMDA61374340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25dceb1e466af77c5a61daeb45b0d47e84c903b470c99ff55761f0880aff03. 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/QMDA61374345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c6552d9377d78964317fef22b41c181a8a1dc2380561fe92f4b15921ac7d2c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QMDA61374008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690b2d3168e8fdabe6d30033e6c3d227b03cff94926581c39571040367ee0c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMDA61374009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9da935b92d139fb895a1a2dd5f1388a09c05abe4512cf2854250f1cc1e4736. 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/QMDA61374010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528471c585bde4d060e882a42e1b041277aa877d47a2ecf787af2d1061f2264d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:52:57Z), 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/QMDA61374012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5adeb4dfb672db7284ed01228cdfbba9f13e4803fbebf5fd3e1d078d51f976. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMDA61374013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e83ceadf9a3b4808d392391a2772da8e0a315cb23a2204d525897706bcc48. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMDA61374014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ce980090ac59ab351e0088e73482f23ce7d36a87659fbaf29e02ba56465751. 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/QMDA61374017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de57621fe2d979447b94203cf147e15b492992a2188ee198b157e08fff2afb7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMDA61374018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54475c2376b35b7955fb995d72d6e035364026ee18d3f8744e12b79a8c6a47ac. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:57Z), 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/PTES11706901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc0131210fe3d7cfb3264b8256e35c70bdcad2960ec5b1d5071ae6b8afd18c6. 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/PTES11706902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde943cc542359737403187db988f347d0440288bd3fcc91ce6a070dbf728cfc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PTES11706903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215659e47c1a287f62f2c301a0e1043d301291289d6e2ac2f541df1808312896. 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/PTES11706904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db6280fa2930f6f13cd7bb38d133d4520514666cbbfb48eae4c47ffe162cd91. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:35Z), 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/PTES11706906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96266fcddab32b0aac3173331b176ee8e78c0f9f8d26a26f341fdd0378a2e2f2. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/PTES11706907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743b48317899ee99e2f11506582312c963aa467107aa541c0e6da3e32c203099. 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/GBENT1330421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6ebf7f38867f486b6a520df58c29edc201c8221d12148b756731ec391f97c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBSMU6107638.
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 0x2a203ad1d361735be0c7e7a789be9cbe4fa73b1fbde9e9cefa417e7062d726d0. 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/GBENT1330420.