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 0xae96e00559f99fe5b4604a3e96667f585cb30b11b4342aa9756d9be1f88cac1b. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ccc167-60dc-4d6a-ba9f-950bd0fe02b3.json and https://artists.proofprofile.net/proofs/artist/74ccc167-60dc-4d6a-ba9f-950bd0fe02b3.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 0xf0a97a10079025fe53679ac2ecc8adb4f1961ccfb827f67696c6bf52d785a997. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ES71G2414482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a82705f455b8a2017e453bf885ced212e03b57ae2e2482e8c5cfafe3ad87. 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/ES71G2412543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813448ee72c281165caa3db8599ab9eb3f49c61a89fcd9f388a4f60d5931e24e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES71G2412931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde442bae240331b8b48127ddb8c0e101bd3325bdadd13abde6eecbe2ba4da6cb. 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/ES71G2416883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813448ee72c281165caa3db8599ab9eb3f49c61a89fcd9f388a4f60d5931e24e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES71G2412931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a82705f455b8a2017e453bf885ced212e03b57ae2e2482e8c5cfafe3ad87. 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/ES71G2412543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30064762be0be12d59e5565004cbd34020ca6b08416bad44456cbab555a965b0. 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/ES71G2410997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb3ba176b1e7c8693e0414e11b18cb81a1ef9496d5daec7368674b40a0c0d8. 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/ES71G2407754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f257c9abd00c8b8f4905211179e967313abf4e5c951527d1ecdf153f12746ce. 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/ES71G2404965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856fa8407d09937a7c892a2444755f17a0728129b914ab00ad1fe001788e5b1. 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/ES71G2335299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677d9596a6f4ce0bfbcef3aaa2525fc5225de1933a0d5cb45ed8848e07c43587. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ES71G2337699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677213b940341bf0ea66857c404213953f2d7cefc1c5ed1eb7badaad4c2e2ffa. 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/ES71G2338266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822083d4d6f8ea32b7d9440f579525c6385da9e1a5195d62d1b52c5c8079002. 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/ES71G2338267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4504d9c60d1d646210078b9b52e27823dc216f1adf8a71a8b1c05d918f05b1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES71G2338131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677d9596a6f4ce0bfbcef3aaa2525fc5225de1933a0d5cb45ed8848e07c43587. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G2337699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856fa8407d09937a7c892a2444755f17a0728129b914ab00ad1fe001788e5b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2335299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eb482efe59195dca9bba7eacef5a92f9d249d0614737f73ff4b1c115587471. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2330311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b80fa6b2ee64920ba12f42aabb205cd0934e0e122949881829210a0b93298b. 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/ES71G2329707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275c5bffd25a74a8a314074ec0990f4dae76b3cf74510db9ea433c51f2edb36. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ES71G2320015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3b0b1a700fa77457a8ec5c5376c91680515a7326d6440ffb6c3db83e47ba1c. 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/ES71G2320014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4171b222ca6d583e35a750dc3b964ca464c79d64dd054e34e91273979d1b2523. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G2320017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec98c1cf17f48368b74d38d22c49bb43abb1a4b83dafa0c094689a7951371a2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES71G2320016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307283023f893db1ea569dc89815282f8b5958fc8c87753eaeb0db814827d7a7. 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/ES71G2316933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c1b10b0a291d7948ee13b4d80749e00b4a9bb0d0bd01b4eb1803cd32f6bbe. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES71G2315492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16223b66a0905cec83ea95da0c60c41704622513b160bf05fd0aaa99212d2faf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX3Q92382677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f5167ca3c79b68de69be86a62272e01c3cd1765a3b2e9b34f14a38205d0d16. 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/GX3Q92363633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579180b23fd2ecda11adb4d0ed8887a5894e6c5457ec46e79d2a719563251c6. 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/GX3Q92334421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444898fa92784861091a5eb4f6a4ffb0b75f37aabb2f406bc81db1cbcf8f2bb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNWQ2231876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a84a460c067e4e00a8a538ba92b80c3225641d73f8e6037c912e68daee1041. 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/QZDA82143591.