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 0xfd0027e9d868ff36a8f5c2560f46ee749f08fb6709014b234a4b2bb39b42617a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e48b2a0d-82ca-428c-ae77-fa555e7bbdc8.json and https://artists.proofprofile.net/proofs/artist/e48b2a0d-82ca-428c-ae77-fa555e7bbdc8.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 0xba6b561f83e077ccce1de581f904ad3c2652b2a6c99e0b39e25bcd429421e54d. 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/QZ5AB1811439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485cf2f66401792f3ff08ab8e6ece45485c25b7b372b0f908599286a064ecbeb. 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/QZ5AB1845461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c49edeffecc7b5e4a367f3a68d663ec02309aedf57b3119d20fa13330f14c2. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BRC1S1800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01961d4cd1f373eb3f007c5bb2439bf4841c3c74dccb2e87a39feba5fbd41c0. 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/BRC1S1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678983bad3baaaa782e838e5659b3db2537c4f6d2e3f52cbb4eb464d37dbe888. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHNC2010916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9dcc6f1e3ce10c972bfffd06546b24166469e10167514261491c6455f15cc0. 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/QZNJV2057887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13a99d7a85d993a3be7a01dee771fda4a34a14dca7b77843446249766ea470b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:05:38Z), 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/BX4IU2405511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb4eaaf06df83d11d590185b4a59b7cec146cea2c9f70248a77ae461185176a. 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/BCWTN2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ae6b9a5818c39be923aaa19f9d46a7566d6d3104fe205160ce5696625f66a4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:27:11Z), 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/BX5TJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905467ea4bc7089d0449fe7e2473669d273b26065f07978bcf8f965525b8bd5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX6NN2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea04a26e2e8be1fc333e00425dc127a011818f4b2799a15ad8c75aaf007974. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BX5TJ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eba934193046634e8a3435479f578f90fc63a9da1071e24a9f77c0b2f9583a3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BX5TJ2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032f1247510c72db21ba5a32a4167fcd82a3a4daadf607617ccb37b42730e2ef. 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/BKXXA2500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4eacc4f7e7bd8144323886c194698e0462d1418e334015713f85fd359f1405. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BX5TJ2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff171ff09c750d8e638a17e4c902416ea0603b483873c968d16fbf5c5f0e565. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRC1S1800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903262ce014318b9426e0d11093f348e903ded61841be72b8d3aba6205d01648. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRC1S1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff7a1835f7a417b55a8a167a8aa3e7797212499206504fb1a57c416417249a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRC1S1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f723a1ad5c9759c093261d363ba66f4808cff42a3c5aae7bb93acfbc75eca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRC1S2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e1a540e59c0dbf0ad20d756bebe130dd01787ca8a5af1163ee06fc02202410. 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/BRC1S1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3070e657b36018d30ad2c703dbbc8f2c037f5ae1b439a7fd4d46d0b2f919ff8. 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/BRCQE2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e048732331885cfc81fa7b1670701677a927de1c4b240f865375ccfd4cf98c. 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/BR9Z22400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d65e0c36ab210ff5863d2099125a1d8e31528f606597645a5e3f27049e8603. 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/QZ5AB1757196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfbc30fa242a721070b55785bffb90b0fa8854d1acb75a48c6a85b6bb08688b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRC1S1800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7358f3ba5c429c1976dc13bf12a919e2de3503bb8a34427c43001110b18ee47b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRRGE1910524.
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