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 0x35b6bd55a7489d1b0313017966c01b9dbf3ba4859ea4f0f9a52e6de9b676f28e. 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/78eba23a-16f8-4d57-a079-0f8f6fb819b1.json and https://artists.proofprofile.net/proofs/artist/78eba23a-16f8-4d57-a079-0f8f6fb819b1.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 0x7ce6d61a90b65bb74f6515162d29efb4b7b19574d479d1ba873ac7fe584e6d36. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA62051565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86cf7a3f0cfaae31f9b0bd2f1895fe80d414b6c8db547773bcfef825f6c16a. 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/QZDA62051569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4724c73ca7009d9b0495a890e77d19fa275ad196c81a95d488ea3348d22c298. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:52Z), 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/QZNWX2011371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bdbb13c18c178f40d3bdad7306682774afa617cfdf9055f996f9e279353281. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2127206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad901e7114db2c421b7f99b09de16bb19228a696753205afd6ff66a56254714d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN52212453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b7318c0add7227ddfe875f35722a176beb47001d3ada47440be6f5062caa95. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHN52212454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68972c7bad0fa556594c3548012aa84873854871c8d3fcde3ce2d5774d51152. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:00Z), 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/QZK6K2233663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704aae3d91d0c991b8d7e9a10f3d4971a4089ca7178105de664f9dc7337fdfe9. 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/QZPLR2232197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aafb0129e249ed77b412f985874a6096b625ba540649083e3b3d657ca00681. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES52394994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353d5dac2375eef6988d097ea868443dd4e2d0a3145da2041307f2acc20ef3a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN52310656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30811458df6936e51608cad4401badf3413e840280e49dbc2ce9bf994b8fc831. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHNA2378728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae14eefc2919e75d92f1aabac9fdbe5f7e9d39fa9d82b65290b41522029b10f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2358364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463a310f763f682d81d6044cdb8779fe28938abfb701f7d5de74633f803a740. 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/QZMEN2358365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6abfed1ae7d3ad495e2f170c59516239343195bfd3de0fec01ab1766a0bdcfd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAX2420877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cd89861213d142ec9db77d7300cb69a3d9bb7de4fddac39f472d5ebada6b72. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:23Z), 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/QZTAX2420879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244be6f7b9a457e2c6c53115bbe223106dba816f6068e7b59fdf70e8e7746283. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAX2420880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed6868c99c8d93a16a94bd12480478314d13a4e8654f7179377ae51af79f3e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTAX2420882.