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 0xe0adbbf7838088e8807d8bcb40471ba2a286c3ea23220ac1a71ebf4edd1404b9. 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/3b4e94ae-22d4-4cdf-b68a-57c12ca50cbc.json and https://artists.proofprofile.net/proofs/artist/3b4e94ae-22d4-4cdf-b68a-57c12ca50cbc.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 0x99af023125fe29bc60bd48348b9de9c98c04c59add7cb31e5077e9f4decf7815. 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/QZ4JJ1748310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbdc58132dd131536671a3c63dfca06cfc4537dbc9dfafcdc57374febfbb4d4. 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/QZ4JJ1749499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53758fefda50ed1b1c7414e27ca7d10995c8eeceff6b2bbcd7484d05fada347b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ4JJ1749498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44620626f21235ad0399d52cd42c26f0e960d280d9136c0385dfce9c40bba22e. 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/ZA56E1702906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5744768ae9d42cec1ab5ac9065e5b38bcf5a3ac02ed69ff23ea3fd3c87b2b45d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX202362378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928bec30dd2bec7da1a02c6efc2701c61a9490f7138954e05f9e700b0c802cd4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2333850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba24db814c7c0600c86334e623a1d68c68090f8bb3f6585c82601eed19872f8. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GX53U2333853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadab907b484954b2e759a4fbd1c4a94d4069bff54a9f44192ffe99f3fef1665c. 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/GX53U2333859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932bba30929be7e334e4ee496813a9bb32ea59460475700279a915e8da9bc38. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GX53U2333851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50550914638257de61ec992d96e96eb7b8b994c8fb71b0f66aadb3678d3d29. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS642167330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba109495eea1004f391ce41df89a54b903bc6d9ede79a7b29352acc1b448e434. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX53U2333855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d458d441ff666fa6dba1e4ce64acf847ab31ffb41102eb1223dfd3d0be1b724. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2333862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8866d3b0612df48c82d63eeee008aee14805e31242812edad8759dc17254673. 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/UK3AZ1614851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc843b0b9603e4f632a577a04db969dacc0e15ab17618511b3ad34f5d19123525. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ZA56E1801886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236cf5a0720d53e1147bf32878f666926ef2a7072e1e0efc710658bbaa7ebdfa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA56E1801888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b14cf1cf9b002b73a09d23f78ba9f197090edaabeac933da9b3bfd68698f70. 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/DEW871908147.