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 0x976bb34a524065ca06a7d18e7744624affebf7ffac4a98b67a97bea069508aa4. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a501df13-cc05-4f2e-a08b-bf93c6dc2bb5.json and https://artists.proofprofile.net/proofs/artist/a501df13-cc05-4f2e-a08b-bf93c6dc2bb5.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 0xfcf80a0429a56392abf4e51b96c151967d7f2c2d41715c4a24537dea06a58f40. 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/CH0830900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8915f9937d92f6188dc7bac8e2ca1ca5cc2085a4eb73df04555e01d70da47b5d. 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/CH0830900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040ff05686cbf7492be070db1d2053f228b412b8526387980213559e109d385. 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/CH0830900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822603fa8a6dbd4fa0b3723f455cabc6826817da53e1ffa9351b49fba193d14. 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/CH0830900617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f77223c2c5df4ffe23830c9dc7a0ca5bd8ad0d45595d4e7e57d243950e69137. 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/CH0830900619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281dcf2a1a2aab1e7317828aba4cdafa013e47f502756f4060e4f4d730becd1d. 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/CH0830900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0284f50a0b5ca2921c5e91a9dec08a891da3940a7f6baa9e95b620410a022139. 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/CH0830900578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819732b78d17d41d767b47cd5b6dde8890a4706358d2097ba01c0a9bd99b777b. 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/CH0830900580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62db0aafdd9db07c8ca16ba0366324aa8c951d96b5bffe6e1d9750781e73b122. 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/CH0830900581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4a1fa70b25c9418dfd66c134a68e75d0af18ff5dda23971ca17f767f066a8d. 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/CH0830900582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8d425c86b1bc8bfa455e5887bc2d43beb64aa8809ddea725f8ae2ad1b27d7f. 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/CH0830900584.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2edb1e6cb0c9d30f06b23d386f0d304fe9e2d36c06d83ba7199ff82d14a7b4. 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/CH0830900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44369b8825da157f74bd9c1c01776d84b1bb47ead2558b890d2497ef69f9b97b. 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/CH0830900600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38854cb9fa8d91733a5a4922a28ac50eadaca0a9e4a1ddf6b614d019556c0b. 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/CH0830900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e3f3068fea288a0a5d872acefe326f49f19719b95c5687872508d3ede0194. 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/CH0830900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61790b6433ae55ba02aa9f619ed5d2efae411d77cd6833d8eeab75d5a03224da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH0830900606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e0a20f3fc7e2a0f55358de40fd393d6227c18d91a6679e9bdb0047afa29670. 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/CH0830900608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3f161916a9b29375cdbe94aaf4ed133f455419b3eb969d000d2583ea51dbd. 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/CH0830900609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97adb098ea5f9bde8d6e6caee8856dfa90e0e6067aee79d1efea0411d5a14836. 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/CH0830900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaa6ae72f118b7ae8cca212944051b2959418689b5c00250780cd50594e6466. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CH0830900602.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727987df2e3132552e6504948cd436e3f75c3b2d02d64b5c2feb7ded2d05d63. 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/CH0830900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8949d844fcc354b653e8e0ff24ea3651e11f4e1653b8339ba0607bd1ec606. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH0830900839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02d79a054a46385089d3303ca7dd39931cd34345ed5f9360b7097f42dfdf96. 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/CH0830900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1ff0e3d3930887acf53a945b5ba297335010f30e96b292dd0dfbedbf618707. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:47Z), 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/CH0830900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0178a8e61d92e84e438a919a8675a2b5e815bfebc0058739b0ada796299ba5f5. 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/CH0830900847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3f7777c24d9ca04e65806ded6eecdddf08924335c748f7611710092f3e2fb. 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/CH0830901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc8a5ccf15eec8cf2d6ab6cf5ff009d5c4f93d590a55fbf67168c6c1b17bad. 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/CH0830901107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9850dec696454c573adbbca0816cc506732a6710ea139056142a3a49c6fb0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH0830901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa0ceade95cfbdab1009de3b5e97218d6a93cc4ec2569d30d7b73e710fc92e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH0830901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfbab57824dcee327dfad87620bde2451b370e41b40b697ca432f711c8dffa7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH0830901103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a508b94c0a9e8d209f4653fed9da487086518b05d68a67245b42c7c964827. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/CH0830901106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f866f09ab7d9069f615e5318905be5bee02889c8099d4b759b52ddae83fb13. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CH0830901109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a493e1bbc4c60b113a7611202babcf28d935db03d37e88029b9133dc617d53. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CH0830901111.