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 0xcdd707b836a72926868c915e64800a19da0f143c08565ad6812d9f4c00ae7137. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f1a33b7-a92b-40a6-8ecb-4327f5e13eb7.json and https://artists.proofprofile.net/proofs/artist/6f1a33b7-a92b-40a6-8ecb-4327f5e13eb7.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 0xae2ec0437ee7af30133cf410e6de130f08d1569463d3f038ccfedb0f84deaf2f. 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/ES17E2100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc33ab7d3f6ed4c38c81712bb9747247d0d16ca6fb940be4c1e75d4354c8715. 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/ES17E2100749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe01856e5574048d6a0369262907020ac35d88bfe6e82cafbc15d869fa9e40e. 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/ES17E2100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca16c5eafa3674bc7cf1de67b890d89199e18af403f65b2ea1f187e0af2951b. 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/ES16E2100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d413b48975fda3d5e7b5f6bc2effb4f46453178d8f1ceaddf3fe8404fc857. 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/ES16E2100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb8f0c7c804b896614051e8578dfae5cbc4c023914ba68a0b9e43abdf1a5ccc. 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/ES16E2100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f17498386bdf62258d6410fd8f4de533b026167a901c742574a3bb2a26dee71. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES16E2100259.
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 0xa6866c524170c02cf3cd4321024abe21debf81bae5d54bb4bec80b06f50bc599. 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/ES16E1900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8ee35ea2592e211ebb42e91c1324905cbea7def87841b75209c95a4d15842b. 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/ES16E1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271ab11db8074698a15bf5847dbeeaa7002698b3b84685132e9dd7cd96be1307. 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/ES16E1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76baf148b84e0cc7de0245465407f02905a24e9e9a360390b4c38cfd455bae2e. 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/ES16E1900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611aabdfc15146f9f226364a8137b6e56dd50a75d92fb839dce25c1fa0a32422. 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/ES16E1900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194954086f9f29dce14dc0ff903c950407b3ff7dfefa05b2574275c16ea3efe. 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/ESA011915425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe818b97880e341c7a74a8f79abe676ed04772f121353493e75c3065d5abfa5bf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA011915427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928ebc52339e2527a7973d079ae4a63932d716ee82798678cad903a10680c27. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES16T2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca6bdc7a21e8cb606d44163eedb9336ae8dbeed2e3bd5e416158f3173125c3c. 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/ES16E2100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6169e77ee34a4825bb005126cde0bf72968bc0ccc5a7c0dbefa70eb59546386. 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/QMDA72439422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b20f8d85938d5e184e23465eef88125f902add7f009c4b4e18461768eaa2b0f. 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/QMDA72439423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a1d9c66b450d42ca55d9bb3f91743cf9f3950e1e6b8eb3fa084e59662a2349. 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/QMDA72439424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d6305a48cb11131d5074d24314cf5b4e5fb6d875bdd595cdb9a6b760bd011. 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/QMDA72439620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056d8c76cebb36f868daafebaa17ddafd5de3c657c1ff81f46b8ee9003017ff. 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/QMDA72439426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca105d2ebfb7c0d9ea6cbd54a99be6ce9cbba9f3a09a501052d7d0115a6ecf6. 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/QMDA72439427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb9676ee82160a63c8d2138d7b62740139463cebeb4cf3d7da7536c42cb52ee. 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/QMDA72439428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779281d0860ff9e1af542b276d934b2adbcf7f330a0de529e0bc83451505d65e. 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/QMDA72445752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85514dc73ec66acca5c277a082c55e02044007d236997d77565365903231147f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMDA72439430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad0ede5a1e3e588bbc25508ac35eeadc308bb8d0b678402cc8a2702d69a5f3. 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/QMDA72439431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa0edd220ca0bdbba72db6121b9282a7d5e296906ae98b4e93df022b2681e95. 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/ESA012157553.