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 0xd685b0660a2c86ad92ed68da590e588f187073b13e8200e6d1d2b76d8023a337. 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/90bf6213-a7b9-465c-9c69-262581f4bf1a.json and https://artists.proofprofile.net/proofs/artist/90bf6213-a7b9-465c-9c69-262581f4bf1a.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 0x4d59d81cd13cdc17d3404a33bed44b98c0f930dce8601afb24a739c4f35caf41. 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/CA5KR2192207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a513b6da6bd040108a124fe5052cc7e26c68a0d0211fe4a6daaa2dbaaadd212. 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/QZDQH2388660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ce05b32b54ee4dc8f3e5a1235afe8f06220b07d03f057291febb14c851a68. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZDQH2371526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e764a4f50ef5ef5f8c63bbed1db23da2da00f4ec6315a6b1fe8107cf13173. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2141134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8705c0e05736548cd46df20bcab7742db3c6f7ce1bba783fd12704e017ddf90. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCAEW2065306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6586f451da1fe4325496933c9fcbdafcae48e89dcf79767b0fb51c18224ec99. 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/QZDPF1812952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee6c981c35793f368ada6009bddfc482c166862ae0dabb87abb205f58b20d08. 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/TCAIF2443169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e286eca40b021aba76f4b7cb89b5fff84dba57aba351faa71ac16d9fc8091. 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/USUM72101574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5cf3f190f5e07c6f995abeb9cb69ddd3f21d8378f91bdb529f6c003ea3bf2e. 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/USUM72023180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c146aab8882ce0712530e8a06da9a522b2567b5824dcfffc87f8e8491783288. 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/USUM72011588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbae539adc7c97dfe7b4770fd7973f3dcb68b60b1d67de6a9dfc550904e846. 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/USUM72023182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e063c714e28ff45f756d66d3c0457baa77d4c9f7bfb2f73c19e2cd243ab93. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72017226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55297046f045fa1b6946ee0588a50f0dcf7c2164ac512bfe688701cfbc1f351b. 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/USUM72023183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62064079209b70fdc36aaa3257b5160550f9351b44b029ee99954a6b4bb3d720. 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/USUM72020219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8fb256092f960b5fdbc18bcf185c97031305f0ee05bacd612cecc0f1f2f65. 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/USUM72023184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea57d292de7193ea0ec9a0606cf1f1e8d4df9673b8cf347d0246847579783c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72013735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251052eccee8833d57995aec9151bd243d0184bbfafde8340c8b5ccc22f712d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72009336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e286eca40b021aba76f4b7cb89b5fff84dba57aba351faa71ac16d9fc8091. 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/USUM72101574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5cf3f190f5e07c6f995abeb9cb69ddd3f21d8378f91bdb529f6c003ea3bf2e. 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/USUM72023180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c146aab8882ce0712530e8a06da9a522b2567b5824dcfffc87f8e8491783288. 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/USUM72011588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbae539adc7c97dfe7b4770fd7973f3dcb68b60b1d67de6a9dfc550904e846. 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/USUM72023182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e063c714e28ff45f756d66d3c0457baa77d4c9f7bfb2f73c19e2cd243ab93. 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/USUM72017226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55297046f045fa1b6946ee0588a50f0dcf7c2164ac512bfe688701cfbc1f351b. 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/USUM72023183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62064079209b70fdc36aaa3257b5160550f9351b44b029ee99954a6b4bb3d720. 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/USUM72020219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8fb256092f960b5fdbc18bcf185c97031305f0ee05bacd612cecc0f1f2f65. 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/USUM72023184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea57d292de7193ea0ec9a0606cf1f1e8d4df9673b8cf347d0246847579783c. 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/USUM72013735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251052eccee8833d57995aec9151bd243d0184bbfafde8340c8b5ccc22f712d. 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/USUM72009336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5653bdf9acb4b529f70479107c49889e23edf2ee8625e6caa225faa18152d90. 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/USUM72023181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430fe554517cf87716d6105af1706771d56f8ffba4129ba01d68435778514d8. 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/USUM72106565.