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 0x1c1aea97196df61e69e787625babac26a27988c17224949e9e1aa0e6c8c0e881. 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/081cf12a-6354-435a-91cf-cfa8f2a3fab6.json and https://artists.proofprofile.net/proofs/artist/081cf12a-6354-435a-91cf-cfa8f2a3fab6.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 0x4cc0821369e812c9e3ddfee727aa5977fe21b4596000e1078381759d77efa1d8. 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/BCNHE2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e7855e820290778f4e6fa6a2874b9ef4ba1d0959debdb1e48c6a7db42445ba. 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/BCJRA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74481c3cf4af4c95dd26dec9e533b4672d0f3a6f54716c634a759e1ab56ef06. 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/BC32K2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95ac61dd1b782a6cf91550ddd4e3a6d6f82b92f73042476507913fbc50694a9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BC32K2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3e53d46db97056376eb53295b5c1e7df811959b5946f7ed85764db8421a43. 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/BC32K2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f47ea4a5f6ee41c3aff4633e4b4a59221a521eed2d12445bdc338579b300a2. 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/BC32K2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78113106080aedf1d5e1cb86a4901b27250a866c96e50fa70cc4eee068149a23. 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/BC32K2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2d20394f30aa14069c4fc034fe823c747aab0f9dbd5f639c1073cd3d06333. 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/BC32K2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe242e5fc7316ac88281a7419f4f0f441e76f59d9ff80b50705e5a470cd7251c3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BC32K2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3cdfd8193cb6b256f0bbdabe464a2b0f5ea117fefefe4b36b60f854f4b6dc3. 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/BC32K2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c112dd5a95ae2e7545f4c89be279295a17f8c283c1dd1060043db2111d28d5. 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/BC32K2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f4c25518795f665d7a0ed285bfc0782f92e55e6cb27c2c8efc0d814fd158b. 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/BC32K2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0953368597c5c9c5c2870e76c3aa781da9b1aabb4e5e53e05ca48f18ce69f151. 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/BCJRA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe242e5fc7316ac88281a7419f4f0f441e76f59d9ff80b50705e5a470cd7251c3. 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/BC32K2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b98eb4f764ab594a535162ca322fc99f9e5f6b92c5842248ce217b7eed6c6a. 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/BXR4G2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62929ac3b28a57db08656835f1f1b29a2ae8b6373cb115efa2f97eb1086b757c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCM9A2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7399b02bb08c37d9a3b9019cc02bb86d2dcab4c6d3e7b2f2cd24fef12305249. 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/BC32K2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31da37585bb0ef073e30eced0d6dddf492593272c8c31780f7348c11ad9ff89. 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/BC6M22424390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc13025b9d5d6ae5465f7c91c6126bc556e3ae978ab9cf58ced31609bcc02e9. 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/QZNJW2126124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce44af63b34487183e18c8e31723c9e99f58daff1bc5d5186fc9826cedaf52. 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/BCM9A2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2f4568fe5a31baef6bf2a12819745c5f6f6f0e2eff594ced192645ee31337. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BC32K2400003.
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