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 0x400e8271b977d38fdf26ec127c084002b972ee8711d52e4263cb5580352adb08. 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/23f6fac7-f2ee-4445-9411-8d522c4a217c.json and https://artists.proofprofile.net/proofs/artist/23f6fac7-f2ee-4445-9411-8d522c4a217c.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 0x18ab8bcfcec624783792f3dad6df3c606c6b6a2965debbeda345bc3853960b13. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/INK492000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279cc34e44bf8e7b9f78365a5d5fcef4ba213592317f55e115034193d6acc6ee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INK492000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fcec148183275cb30db4890d6050c756ae3816f0fef237ebaef4862aa52669. 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/INK491900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a118a4b710d484da6492211d357e42a120c1f443014894a5a204fd21ef38898. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/INK492000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d62dcf1d7346b5bd26143e273ff6a226ad59f87db79fded18cb51ea072babff. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FR10S2154062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77bb8366fba10c0d5bbf9eb20697736fbaee43ede8e2b1a4e0b5f8db9655c5d. 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/INK492000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd45051f0e07b207426fe70b39f7df419a48dcba6d8a1cf0e30968fab990051. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FRX452134614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf341c1e4047856e9656cef7dc37189b10b99ee3a618442133093f43ed9508e. 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/FR10S2214141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a0a91c5fdfe74298946dd33437784c9817eba95c4ecfc870248732d94e0ba. 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/FRX872200885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93b520f0a01b9b6ba146009fe5c3f1c7704390f445535c8501ee49bcf63ec6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S2375063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b52814544217cf0e618b2154125263af7e7924330ce6c6a8b484dffcfcc2ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX452385303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb431b1f21d6a84548b1ef0f2be37889f37661d34f5488a9e50f1c0b3ea373b92. 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/FR10S2400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a290fdfdf889c343bc86c6e7e47c7d8a545d1bda02d74925e7f2dd31154df. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/INS172307082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48d95361c69d23e37addcc8f5d486d1d22479e094a74968f65339497df45b48. 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/INS172300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c761786a658a45daef4262e03e6d295e467dd4ce6f78f295bf0f0e8ade1c0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/INS172400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1d06c6bd46d9e1d81bca1ed819adc20c1d80bb67060889d366066be85f1174. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:59:13Z), 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/INS172400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9ba3c45503db4b622f44a43caac815906fd9219070baea7a0ce4a27f063bc7. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/FR59R2497027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a41941d8ca1f8fd54f7059feeb32462fc9dd19795ec06678eb4cfc49de09166. 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/FRX282411320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898b5226e079bca109a6f98d4a9b2575b1990eceebab48b066c62cb136413392. 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/DGA0R2447370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5da75445976bb80812120ae9880396ecb17f281a46a86871b00978091f9c081. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR2X42588967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d34c1bc9ec42b8dd02d75c60008409095c4721ce69551a30a2ff8897383f9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:38Z), 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/FR2X42588968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32725f6f6a46b6ad8b9bbeb559c3014f5db69a29426bf2d6ea9b735d2cc302bc. 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/FR2X42588969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d7f9fdeb199273b0d1a3bcf35afa59629d6f21e45d326912a54e52b78830bd. 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/FRX872547863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9096cbe7ae6c24456871bfe7bcd49d641e68bead7a7d433362ac49086ec4f. 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/QMFME2372870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c92dba4a96476a69455e733886788dc9c1495f8a57ea5ffbac386bc5af57765. 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/QZ5FN2471190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff5fc0c36affe90de837e6797aa1aebef75117e8326167fe84317ea3e7d5a8. 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/QZ5FN2217696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd92803db99dccf4c1691e6441e998bdef26204d66bf000c39c786157ceb101. 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/QZNWR2050483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399238fb3bd3165aeb5e4672c5627c4fc71895a4dc1c4370026caa3c8dd92550. 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/DGA0M2402736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72734fc0276428fe64611e357ba6c7cc537773aa87bd6b35f298d827bd8c6110. 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/SE6SA2409648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0128838e8bf87e910166336b852a2035fd1ae14eeee66997d0eec76c7e537dbf. 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/QZTAZ2377660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a7292369de2f706aaa6019ed8a50c7f541da75eba894b8243b33dce759e12. 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/CHF032402995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e1a4f8975b227f3a3bd726274642fef9b7fb275acfd8aa8a18f3784ecc236. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR2X42200143.
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 0x56b9932644f13601d234162c9e8c1eb7f75376e999adf2dc5ec465a46160dfe9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKJ8H2009739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c2704572c8fc76549490e15df469dc011ffc537691964a67c6339e61303a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2215671.