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 0xa4eecb58cb7b6c68c53cc47ca4cb6d30e41ce4ef1b53bc551c04fa2fd158ca6d. 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/f7cfa147-c231-4f95-ba78-3294dcfe4b38.json and https://artists.proofprofile.net/proofs/artist/f7cfa147-c231-4f95-ba78-3294dcfe4b38.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 0xd43436df95a7ac5ace1a302738bc44555714cf28e52225e31dc35145c9914526. 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/DEQS92200916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c83d8616122f1bac3b0d16fa5aea3424bea28121adc2a34306fc09016a13b4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEQS92300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4256d3ea76c7228c26931d7dc2312162c2cc7884f883fe96f1b0062e5d06295e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DELV42400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e56230a6bab85ba1defcc4fdc7be3938f90671e2b1e8e4c1d66b6a55bcd68. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DELV42400887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b468425677d3fe85b361b3090d2d56ae5d53a4d3c9a44031dcb6baf95b8001. 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/DELV42500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d602c14cc4a451763ebf7c7591cc8d6d15cc0f04ad13aa55a11f305a15b74c9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DELV42500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d61b842e1c494fba02990b5bedabc9a1d7ffc50a0c2a82f9cf2e98e4a4feb. 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/DELV42500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5bd2c8448e353cde576019c5de883eee334f6ee078450648795e1fe421d3d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DELV42400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b468425677d3fe85b361b3090d2d56ae5d53a4d3c9a44031dcb6baf95b8001. 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/DELV42500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dbdd5be69a9784370c23bf3a942d6316986db9f98466d4e9a05a018b336f2f. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:10:38Z), 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/DELV42500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c83d8616122f1bac3b0d16fa5aea3424bea28121adc2a34306fc09016a13b4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:13Z), 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/DEQS92300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f34fc3dc23e7855dfc2923c975f406524ce807d6ef7ef5376e71e28b74dbede. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DELV42300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5bd2c8448e353cde576019c5de883eee334f6ee078450648795e1fe421d3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:52Z), 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/DELV42400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b468425677d3fe85b361b3090d2d56ae5d53a4d3c9a44031dcb6baf95b8001. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELV42500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81cf70423acc93b474d084ecbac9b0632e20a14d78425523c0ca7a57be6dfd5. 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/DELV42301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b31117d908b2cd019b4d76b92c66d06fd5a85f1b628b25241a2b89e7ab49b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DELV42500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5bdf594e2615163aba40a55197fd1105cfd0a0e822eda7e11d54f64a966bdf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELV42500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051cbf0b0638d1a7eb2ec237cd93df00d3b2e870353a59009e9089268c29c64b. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/DELV42500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d602c14cc4a451763ebf7c7591cc8d6d15cc0f04ad13aa55a11f305a15b74c9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DELV42500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c83d8616122f1bac3b0d16fa5aea3424bea28121adc2a34306fc09016a13b4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DEQS92300435.