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 0x8c9970b7330604b84a756d89bd22dbb025fd3758c438224083bee63c2f812beb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cc21b15-f5d6-4788-a759-1fe9afa7669b.json and https://artists.proofprofile.net/proofs/artist/2cc21b15-f5d6-4788-a759-1fe9afa7669b.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 0xabe0b0a1f9da4bcf1feb3cba92af586bdb1e9e72083aa0b23196514718712233. 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/QZK6J2071722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53dc2b7615560686218e0fb7d62f1d049566049f9449048a8d8371fe0ce70cf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6H2006624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8569cb96374f5e44df850c58ad8b32dcefc52f7fd19c40294d62aba1199e606. 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/QZK6H2006625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df1b8d224989352a79684e621752072235ccb4bff66b8e97dfc91c4997d04f2. 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/QZK6H2006627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8bfda3c9833d5b0ef5f39082199234b85217a5c735ce87286d80e676988ad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6H2006630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a68155d4765ba137782a08cf579429f85ff18b8b7c9305785ced869c57c943. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6H2006632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c2a4ff0d9dae2fe189b9725037f14515fd49d53a11a18e0c3832edc4e46107. 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/QZK6H2006633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb630e09df1bc8fc6c5da08c82b68a126f3775fd9c67b03b8101f2cfc216acd2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZK6H2006635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92ef039bfc86fbe4706d2672170dd8f0888405f1989a2cd19a62138d4fc9338. 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/QZK6H2008614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb861b54a492b6080bdab0ccfa18d0f3b175c972d34f38fb4423b5ed93a14ac8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6H2008615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb53b499bf2262565ee11014602bfeaefbe0db022d8a8b6cc2bf6ef9d86d65. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZK6H2008617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd242b8f3b490003f939e83596a154e8449c351aac4faec48b263c14ea5a8b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6H2008618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048534893994fa6a0abc53e7684c94dd331b3b04381f18ee6682e2b32c7bb2e3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:09:21Z), 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/QZPLR2165138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af9bde1ced234ceb07bd4cf801a306303fdc84752f1a3f188fe29c90ac91b9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPLR2165140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eae132c6419373a181392c5cdae703a8d4b84b6156375a95daaaf1596d0d5b. 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/QZPLR2165141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e9a346ea5b2d30d379d25f6d1c96a0d141d9ad4a4344c3e4da048007147797. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZPLR2165143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b494ac1a05fa42290b097f7dc0859d55031ec939324b250e93fbb087949f1. 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/QZPLR2165147.