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 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 0x36edfd46b029b211f08ad5e482521ecf7a30274bb5db44aab290d4ac9397d010. 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/4814e6f0-433a-4f98-bbc0-76802c7bd4c3.json and https://artists.proofprofile.net/proofs/artist/4814e6f0-433a-4f98-bbc0-76802c7bd4c3.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 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 0x020db30de985746e329a13b042e02c9be3fca7a6705ad131a3506115f4641306. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22538502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f4d64dc0da7f113528a1ee56d8898989b145ca56c87d098088e566c08d257. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMA22560282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311e73d2d2729a8998c21b137c7c632eb5f8c83e056f761f70e1d2a9eb8711c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMA22560283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f6222851a3f62833b38c6ebddeb0725e8921bd026fd6c8ae8dcb259fa3eab. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBMA22560284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f762a4e053f93c85981773ea1c6a71a5f805ca32c4ab59f6e6cd62621d445. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22560285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab2299335c7a98d740a94b055e551c4550a2bf8700e2a19f6202bcec962681. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBMA22583091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2583024013af99612d2f150c1cc0adb070be255a79150ed7198965d15c9a9bc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBMA22596157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51007c96b7e9ef20296e7e39ce6c01010abbbdc2fd97f6092e7160e50699949. 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/GBMA22596158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68eeb38e164976613476db7aa265da67972abecda143d36802659020f7c7fba. 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/GBMA22596159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6f35feacf6724714295d94f59d6e2f91baef11b806509e531d4aada38555c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBMA22596161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b2e6d5b3bf7bf0aea1a7c7a19b297ebb36e0a0d4e24abb1207c318aa24a2d3. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GBMA22596162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a7b47b4c86c9c7dcb477a9615c71e58bf949a0536294714693a39102567bf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GX53U2527475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d35254cc7b516f20aa0261483c4ef46ad6b73af80d20f157ff2680251b6127. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GX53U2527478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa017ac0f886ac642eb90feacf9843ed70badab855037989f06fba250417f1e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX53U2527695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf037c8b7a6e8c339029cfb096a4fe1c0c304a2a130f3af2faf297384d5b99afe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX53U2527697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03e4bcbbba0c2e30f38ae447836e122b2940ea30fab09ffbc991c3fe8046fe. 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/GX53U2527698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c2e652b724c375119552a376ff3f6220336ef6c464092af3bc02339c5a3ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GXH2J2559282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d78ef751e075475bbd6e57ac985cc615ca60a65235697e97157cd1df418ba. 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/GXHAF2555133.