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 0x297a2fb158bad1bd901a1c5daa7c3c56ac9af5b71638bc2c4027562e4fb1368f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9e9759-d6b8-433a-b8c4-b95d9f0f5e94.json and https://artists.proofprofile.net/proofs/artist/ea9e9759-d6b8-433a-b8c4-b95d9f0f5e94.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 0xda5b65e79435f34942f39f29151bc788d9662c3842595508067c9aadabd73a6f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY2161436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697df6bb11538887d118542a04fd56fa9b1d8eb6f7cab4b30116f28df332553. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY2161441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4aaf7555cda84ff70dfca9bec0d85c9e9688e98d2469c4c9256c26e910cd48. 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/QZNWU2554954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31942fa9d6275c6dba3543d2157eac3738de1c504d2e095d005e61763515f427. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEP2519834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e594d5fc9656c779adbbccca7a8626f2b61ac81427f92a32fc119df714a50da. 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/QZMEP2517697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e594d5fc9656c779adbbccca7a8626f2b61ac81427f92a32fc119df714a50da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2517697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04b9485d32638c7f3df4e8cfcbf8aeb4b3ff3c8a7530e095ec007cd938f0d03. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFR2382487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f597960a7eb7045ed2e00f0bd4df92e6d50f7c9b74b8ed8be5204c01fc33db2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAW2218995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a62ad7b6b8f00b7192d82f38eed53c712b32029345172b80494cf76d5bd8768. 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/QZNWT2215579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caeac90b473a2fb009d39982376e716e7fcabcc486107b2a125c5edd8b916d1. 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/QZPLS2170651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62c9ee5d48ab758605a3c745b335307c3d83d1710ffe359357b971aeec2488e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWT2152967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366386cdd4111eb2ce7b6e8ad0190e6324e85c476e211123cb7de67c3fce6c1. 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/QZK6F2103163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ea053fdc85ba1989f10b29f863c1b2ef34ed12e389abddc83b0a6fd380594. 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/QZK6L2100940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57dabc395a57fc559ebdc63f69274353b318d55e91426e3c8f51f212688a0fa. 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/QZK6L2100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f4e3bfd2b6fd9e873c4b4f0a074215a5dae302b044304c6ec70378b77ecdcd. 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/QZHN82135729.