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 0x0645a443f98a85efde063be86ab151552c86f32ada2e25c0df16c49841709a73. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b5550dc-264c-444b-8ee2-d711fc764811.json and https://artists.proofprofile.net/proofs/artist/8b5550dc-264c-444b-8ee2-d711fc764811.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 0xb852da4c3e636dcafcc0a38996dca07c8f22bea0f972bc7307b026c0237ee012. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:46Z), 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/DELJ81899489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c51505f945367522a3ccea1e68b69fd3a62b9e5cb29e99b7ab240bf6f0865d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:25Z), 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/DELJ81899490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef09fd62a50b29397e904d66b81e93fb6948395d945d50c8cf8d0d02f1e136. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:55Z), 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/DELJ81899491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478cb14b7d0945d7f5e635f09816e0d09a32c17adce574d2d7d385cfbd631621. 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/DELJ81899492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d4d940c62a74fe49a63351faced4434654e829ec7f5a07b7e71100733422c8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:05Z), 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/DELJ81899493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5d85ec5d3bc5a874dfe2253294a3cabbff28a193154ca25d398501bc32e19. 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/DELJ81899494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6294df3156739ddacbafb6a9dd4277752ae9406b0a6bfe9ac56e4110e664d. 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/CH7811931620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a67cf2ce3407e2f23a71a7d9b4bc866b91da79330e2e30a1525d5d1b6fb87. 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/CH7811931621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b102ec5adc84cfb17159ec6e3bad5385af3647b744c9927789e4500807c4f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:22Z), 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/CH7811931622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75edafe9e7b44f86b22eab7eab4dbf2fe983c90e4daca2238a496a7d5265da34. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:02Z), 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/CH7811931623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac8fc66f977d8d7d8dabaac16c1a8444bcb7c4f359d97c11c744e5d82112a4c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:41:54Z), 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/CH7811931625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e2d3c57f81add2bb559e02600f22edfe4022bcd5e443b6fb076903fb3f8eb. 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/DEUM72004421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77afdfc55fe3df281f5b9ffe11535e862700359d87dfd66a25f3e9ed3910b7. 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/DEUM72004422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a94d66b22b97869a15059aa5e7b6c62baf89bb3782616b26f0eb213337333. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEUM72100883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb380b646e0fcddaa3221b28dbc59ee78924cb08ab759087789152b345ffb041c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUM72100886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9fb1a2fd4329577e8d888703aed2b6f17aaf89f1a5cef858be5b539d0f06af. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUM72100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6a0e54546ef783ae78dd18be6af515825cf851e4ba4a5957b1f518d59417c. 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/DEUM72100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc807bf0720960af31fb6005761f20fd542fe72d3c6dc731d5fdf094b2098c1f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:35Z), 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/DEUM72100881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a94d66b22b97869a15059aa5e7b6c62baf89bb3782616b26f0eb213337333. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUM72100883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb138e1a5e6a44ff551dfa30f7799ad2b6f38640c6199e58c149f459d627a798. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:41Z), 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/DEUM72100885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66063be6e5202f6b1e330031deb72e14b51e855e8ba869a6c9a14ee43495bb. 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/DEZC62356075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91129068425fcdee2734bec6cd1d4aecc59ed47d9db75e1d717e8400a537ef63. 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/DEZC62350764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3a09a493f2b9f215f9265848d2d0e02479ce271fd6a2b3cc109ff4eb4a4e07. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZC62499147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa540bc977a7211179608f1a6913d94fdc7cd5330eda7fba36c693f9d4d009524. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:28:18Z), 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/DEZC62410072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e5fb7d170f43d9f4ead1908a27db931b848d7d521c588af98c75d4b2a5b73a. 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/DELJ81753761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243905b58b4cf72fc684d0d974463d2251d7d889a534c365f5028896b25ab8e9. 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/DELJ81753764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb982f672c8bc1aa10129581e0ec2e50d0bf769f434b22ccd8254a87b34e256a. 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/DEYX82251099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c7d495807866ef2b0e7b4952aea06b481fd5fa247cf68cbfd0ec417e823609. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DELJ81753770.
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 0xbd03d13cd1d07be37559788f624b2280759d96bef34d276ca2575e5781f6e6bb. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DELJ81753779.