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 0x7c20a45f8050b57d7d12370a72a50e6a8d14ee77ea08dba306a9356a599cfa06. 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/ec880b48-8c2c-41e7-ba36-a629f7e2a1a6.json and https://artists.proofprofile.net/proofs/artist/ec880b48-8c2c-41e7-ba36-a629f7e2a1a6.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 0x56bdb88695b43ea72e30d717afff08ddb61527c8d96b1c6f9037d452b13b1586. 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/BC8MK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff6d54860db75379cc8fa43f5234cf7d20b1192b804ab667377847f1281905a. 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/BC8MK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a99c81281a9c34e978533ac8603a532a40c0996e45cb943bffe118f67f5458. 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/BC8MK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d2113fc9f7029a48f4d56f83945a4f615eed78b720979d969666ca3f5783b2. 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/BC8MK2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d481b6b13aa447d1725b7ff9ca619843701b4484c3cb00fd08b724962e984. 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/BC8MK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0dac00dacac2c66fb08d018b333e1c1c1f87c331248ff233c6d6a106869d49. 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/BC8MK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bdb88695b43ea72e30d717afff08ddb61527c8d96b1c6f9037d452b13b1586. 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/BC8MK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b9b86dc759992f839a0d6ba8cc394283a7d2e320453b9fe7190b8bdec05757. 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/BC8MK2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44462ba50dcf770d4eb7e30ae23b252697222bca6b9e3470679a131a0d281af0. 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/QZWDD2287065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899e89c941ea55552c5f181e5863c192f092a0095700e3c95cc70229142fa609. 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/BC8MK2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c351cca11454feb48ca12d2b5f1fcc942cc5413ff5285ea14c8b5c75a15875. 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/BC8MK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2fdd483c4f34350a12648f03f71a4ef45042a537be8395d65c890f3c7a81e. 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/GBRKQ2290442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125228a42eb095f49cbcc6ba0d1e2135d4398179017f483c9f2ecb4e6fce36ea. 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/BC85B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d481b6b13aa447d1725b7ff9ca619843701b4484c3cb00fd08b724962e984. 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/BC8MK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d2113fc9f7029a48f4d56f83945a4f615eed78b720979d969666ca3f5783b2. 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/BC8MK2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bf6c18226a8615b46a8839c2e7c1a1da8205919d58cd486049d4c69aacebc0. 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/BC8MK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66bb44e0137bf0c0c9d79ab31948703b9987641fed5bdf77897a51d6c8a1c06. 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/BC8MK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4334f796070b14f2cef7c54919a09e53b81390a37ec10e21414c0cb2d44e8. 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/BC8MK2500001.