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 0x8e5a6e88e82c5671fc90f7dbd4453de9460f3ac7b413825529386e03cd5a1ee7. 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/90e047b5-0085-4faf-bb3e-aefb8021a0b3.json and https://artists.proofprofile.net/proofs/artist/90e047b5-0085-4faf-bb3e-aefb8021a0b3.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 0x3da8726f558f13bf12e559e1c820c27260713195a8ef98fccc4403453b3e8c25. 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/IDA642103312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286bf2e6d4a074d759da8c8b881512617a26519a80ed925a20afcefcdee7309e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/IDA642103314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5c3998c99ac76082a88dcdcad2e0d67039ede1ad32c7632a51337839fbdea. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:58:58Z), 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/IDA642103317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95868dbdc52f96eb48d2f0406be68529c6a0640717db0ecf812da37823f092ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA642103321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f749472291fc641b552c90b20057064d4f369a8462f195bf3572332257a78cb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:31:28Z), 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/IDA642103308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9340837cd01a0984d15b3714e5be7cbb628b345cd4339c09db9a5894edc2b6d5. 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/IDA642103310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4423f97aaeea1349f1a1803880f358a84e315868f7e1364ed57e2e3ac9c70bfe. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:17Z), 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/IDA642103294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d926150efc2ab52b440b8f49833ab090e1bde563cd22e45cb2e0561cb1652e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/IDA642103298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924197e9cc3cef23c890910fffc8ec135c0e982ef905e1def61a9d1c8206e52. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/IDA642103299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26abc83a4d2b496aa857efabb8f502b3ea948446cd09fc57b0df91fbef3bf1d. 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/IDA642103267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c16d6f4c121dfa820c26cb2425a2f3b56d8fd50cbf863c62faeee365ced95. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US3DF2106869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c80ba511671278296053cc08be7c49a0f2c908da00b921bed27752b9d17e9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IDA642103284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d981e389bc4bc051c70600d9cca30fc4abc977fa216936829813c94babb118. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/IDA642103287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c183590a14470da35aeabcdccede9598a5353aabe35dac3d34a447119c7d05. 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/IDA642103291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d46ef2a9309fd0593b97b00222fa87f61c435a62f8d19adc84bccdd22aaf60. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:08:31Z), 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/IDA642103292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5312bd95744c5769dcd192c152c9ab16a6f6447c67858e44ced05048a54336a0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/IDA642103273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e797f7c7bf03d5e8c8a857f15d93be73883ec23af6b31ff73e7c2628def6dbb. 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/IDA642103275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc804b5ca2ab2b2a6687680eff70568de0c0bee48dce4f6a3acb17956e4046b68. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:32Z), 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/IDA642103279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574aef178d03e2a7d37803a9ed2dea9f2625afa8c1c4a48b412718800913e63e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:31Z), 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/IDA642405510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb86aefd4672a03cba8304d1f3cc5fbc4011c5102cabd6d807b424e27143088. 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/IDA832403061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0676a3ce03c4082674e420a10db938921aa0e0f085fec2430e45458d28e3950. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ING212400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed016ac28befab958e0ea2b7a479f6e693f89580986f1655782b36165821edc6. 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/IDA642405642.