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 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 0x17ff8d13b0b374e4e52cfe4806d084147dc2c1dea7d51485c8603539a7fd4629. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd925645-5a2c-40b1-a148-4319bd2f1551.json and https://artists.proofprofile.net/proofs/artist/cd925645-5a2c-40b1-a148-4319bd2f1551.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 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 0x10c8886c4f7f5a2a0480dad221c656fbaf6100707e574b8757e505d7a8834c13. 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/GBSMU8802129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f16461cebdd579e86550c2c4c264dc5ab96f6e675ff220c666f4f406cc8de4a. 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/DGA0R2420676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f037e37f81042f0bce33c785e01607a66cb222b35fb33cfc99693d3dea911. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DGA052413551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e837cf5ca13e5bb9747ef13bdee78970fe982bdcf163a908ca8e9a7b16b7518. 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/DGA0R2420677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384ef6b173d10f3be5ef4e9efeca89a1dbd9d01c06539820e5da89a8fe91595. 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/DGA072435788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95af3f63d3428f673c3e684a092d56fb0a34322910306f56e1c08932ebf98318. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0L2464132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1993856adde9cb53f5255f3779cb476da059639cb3e22ec513661644937469a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA092475090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3181c6805242bb22c42f517d319f166bf8585b6ce416682ee08930d34084a6c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DGA0R2420678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1641a2b10985c130b2530da9f9fd932bada8879a53816ad0f1dbdc63c67553. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA0R2420679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1341af50b3736142a3af1485b3166a26dba46a0c66cec9d1a846642b50e90b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA0R2420680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa1ae3ee066f5f266e9acf7af14d7724bdb1d14125b666c8c7fd4a4f683b5d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA0R2420681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad5200245daea71859adc50366394efff2584d0951134781531f508ab5f6734. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA0R2420682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78486d7197aa45afa6c08db3fc9c1b8f344e4e2d98307de1aca7f7ad1427e9ee. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DGA0R2420683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dec48b1fbb3b656e69f5b731110816c6661213955229f11a4e1f3ef6619866. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHZ42214754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a2a7ff46056b98916f47020b947a5f2dfe6ef00548230a365e6837baf43c11. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ42214756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3b51eb983376c72f6ac06ecda335e21dca06b86dce9b58ed2c1c5ff1afae7d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHZ42214755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f108b344f1fe1c34844d0dd599fd6b7a00a8ecaceb8d6d1576068f95243a02. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHZ42214757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4967f0e66bdd0317b794188787b19081485df1b5808a137f0d8d69363a64448. 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/QZHZ42214758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7fec9342d1ac246d08d39d3de23d1b201845fca4f747226149d9e7449f5b08. 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/QZHZ42214759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607bdfea2172aed905117ff8ac8068b4bc772c71763de0b217cc890b0aa15975. 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/QZHZ42214760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7d229bb5ed596fcc9b725472d99b1cebee2ccf7ed5ed1723ea5b2b0e833c2. 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/QZHZ42214761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd36ce13a9d025affee7540a9b7ed47c62895d559aa82925a88b25b31c5b721e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ42214762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55013bb8781e4ec5ac1403360fefff1e8d2552b3aa12a203e4641161b689b4a1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHN31921487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3be585ebf1371e4284f3e52ea460631a756cae3991f28435249fe3f809eb8f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN31921488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7feb6bbcc0da2b374613011fdd1231cd7510308820f79518b57325c992b1155. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZHN31921489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993f982f6930c4cff6b82c236a4089b94223ce9e4ab2f0a49ad520afb3e65b5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN31921490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8678bfdf52c4b14a74bc5d8c5d9a8355a78dbbd80e3e94cb20a667bb11510. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN31921491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95af3f63d3428f673c3e684a092d56fb0a34322910306f56e1c08932ebf98318. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DGA0L2464132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1993856adde9cb53f5255f3779cb476da059639cb3e22ec513661644937469a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DGA092475090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f037e37f81042f0bce33c785e01607a66cb222b35fb33cfc99693d3dea911. 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/DGA052413551.