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 0xb8c6eea693b8d254eff4304f04efddda5fa53072d3d18d9f5aadd6fab931475d. 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/fc2970e3-74e8-4248-bb4a-6b94afd7a922.json and https://artists.proofprofile.net/proofs/artist/fc2970e3-74e8-4248-bb4a-6b94afd7a922.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 0x3a734e8451d06a595f485619514b11010166c41445e045809d420daffc60262e. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/CH6542260266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fec198b2b6d78e3df22df52d3c018606df7fba8e0acb6494101117fe5fce9e4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6542345578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7683f0a9bebe27795533debb7d6392995b3b2a21581e2236d4dce9881e1b694. 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/CH6542545733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b5638f75be2ad639b91943e400718c87915a3f4ebb09de2b38e7b73bf57cb. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/CH6542545731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb64812943362d6bcaec07a42762b45c847b2a923b5ba8efa08468bb089bddf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CH6542545737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f6027ba1b725894db5b6264a9a66494006c4f5636dc2193b4d0a2e4880da3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6542545728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3837f3543f5239911d2d386aae795819a3da4492ede8e7d513faee4b8ecc6343. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH6542545740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ec0f47affdb4b042266551bee187d0a0d0619afc1d8e1679a7570f1610818. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/CH6542545732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038ab061fc9e074924f2049a19e37613b0d6c6c5285ecdd936f1d377b56a84a2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH6542545736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272533e2b7059769f0dd19c58633f467b705ef3d3c2114cc67c52a9555b636e7. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:14Z), 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/CH6542545730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f3e1b94b1bf83636fe595002b506d9553f51c6ed4b37bc2c93126fdf40b6e3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:36Z), 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/CH6542545735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a24e1a0057de9e7173a2699d3b42b52706dfce23ffc21a7eb52dc58d5dde342. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6542545738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a59983f558217f0ff37a9fbaacfa1175098ec89e0adb69774c6302759199a9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6542545734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64787a1f98f45553b0bf92feecbbb0fc0a361fddd6c14b8d3c727df85e4c13b9. 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/CH6542545729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa509f97a6d2f9085afe8625dfd6d5cc390423a0cfddf763c268d5c308f451f6c. 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/CH6542545739.