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 0x0eb2d10fce2b9897b53f8903d36e4be177218c3bc00ffe3e9fbbfd4dbc229401. 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/3b457571-b9ba-490f-a5a1-37309ce07aa3.json and https://artists.proofprofile.net/proofs/artist/3b457571-b9ba-490f-a5a1-37309ce07aa3.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 0x0cef6bceec7452d45fc12bdc842c2ce9709b8b689b89d9ef206269bff7578d5b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:16Z), 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/FR5E70100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf96ffc0e43dc4bd038ce564fb82adb5e9bcddce4b8e0b17e3345cc8f4a209f9. 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/FR5E70100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952bd32536b3b46a8e247c67e1fe86843d8ca7566d85340020a272673d74f0b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:56Z), 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/FR5E70100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328667720d7fe8b1d3f7feace070995806d52bf897da598a7d99a9a6b7263c6b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR5E70301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207798103e81c3c00f9b1c2f7c0ce487933e691d8d81ea074cebc40ea173db73. 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/FR5E70301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01e7930ad4e67b8703b884135571b2504848408e2c94016a650bb4cc4320ea. 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/FR5E70301990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1374da6df7434c4efdb86362917c8de32012f634ca9039360818197da1381db1. 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/FR5E70301980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc5a13806f78f671fc256869edb6abc968fa36a1f513608711ee3676d0a338. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR5E70301960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328667720d7fe8b1d3f7feace070995806d52bf897da598a7d99a9a6b7263c6b. 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/FR5E70301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207798103e81c3c00f9b1c2f7c0ce487933e691d8d81ea074cebc40ea173db73. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR5E70301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac93ee7f7d3c613708ec4051a1d9290844c4c60ed93ae554cf4b2a4d2b8f9617. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR5E70400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01e7930ad4e67b8703b884135571b2504848408e2c94016a650bb4cc4320ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR5E70301990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1374da6df7434c4efdb86362917c8de32012f634ca9039360818197da1381db1. 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/FR5E70301980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc5a13806f78f671fc256869edb6abc968fa36a1f513608711ee3676d0a338. 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/FR5E70301960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a6d69c437deb6a674e7d1ab568e8c81f253b16404055a68aac6ddb7f3cf70f. 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/FR5E70500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fcb2227aa62b486f92159c32740a2fbb68f2fcc03551e86990a8b1c6b1c061. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRUM70800925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6567feefc18a7e8c20a5062579f5f12bfe38e21cc4cd4544a7a71eb705ec4999. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRUM70800932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd632a3e0a0a916914fe837052997cf4c60f7d0a0eab453d8441957b22866ff41. 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/FRUM70800928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91743bbfdd454d9219b235b0502dd3a96b22c5c48bd24139c429c5d766568ca9. 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/FRUM70800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be2854162e4634f56b9e01bb707704ceeab638c4252d0ff6bb77698ecc5e2a2. 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/FR8GV1709050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be2854162e4634f56b9e01bb707704ceeab638c4252d0ff6bb77698ecc5e2a2. 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/FR8GV1709050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1087859f988f28d799a0cea5513fdb17e2c69b385ae8dea6291894b9a07ca5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRU770710013.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch