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 0xbbacb740a041d39872fd07f893d82d247b8b4b7d40e34a93bccb37432aec47ea. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5522896-888b-4352-9fbc-30d43cbec474.json and https://artists.proofprofile.net/proofs/artist/a5522896-888b-4352-9fbc-30d43cbec474.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 0xde1666c21565bd113b5d674a1ff4727f82658f91ced5147c7fb43d1c0ed2d571. 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/QZTBC2488615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73b8dad8083a486d211d278671c0aa90fe3874d792cf40e58dc094448f2f197. 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/QZTBC2488620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef2e0092f2a6c76df2d3a657dd3918fc8be938d8f8bcec4c5e4aa3145fe39c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBC2488622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a07f5f06bb3dc29c476ee686cbe8c3fc0c729489ac3e23258788c926b95b13. 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/QZTBC2488624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd3b2574fd430ca5ff243fe145fe49028a4512b9a116ac6c0004af7bfc6ad6. 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/QZTBC2488625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5533e8b408e35168dd2c452c092e161b1fe2f2357856b94a2b6fbe745b93aa. 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/QZTBC2488627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeae29118532fffd357878547b4143a5522e8507edec16b783805e974bc422de. 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/QZTBC2488628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec95324cf25aaceb245020031bb20673a6bbf69968fac21f4fb23ef233519a3. 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/QZTBC2488629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe032b7c343a7de6453ac8bafa4605dfce521853314b01860f98cd864b61f3810. 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/QZTBC2488631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e43a4c985402ee7dba9ec29660f07bc822b0e6a2ee321745e35b2cbd0464e. 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/QZTBC2488632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a685a5da6942de5edcea5bd6484da8c4ee980bbb0fb0fc87c79215f9c5d0998. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTBC2488616.
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 0x1a843fe7d24d8163962eb9adef174ba109a465dd022a11bd635a9b2788f7a29a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTBC2488617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30e45f862a3aaa6ce80f96587be5dc9da0f90c38cbbb453f8538cf359b9e4f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTBC2488618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079559e2dad8c8d642df248662dc15f440cd46dc968502c73c3601dac7025f5f. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZTBC2488619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f509f3a7cb4d747728bade9976ff053979255940a22433a02dbffa5607d777. 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/QZTBC2488621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c418eb395c2906d3fa2cc009f2e196435ebd2b1eec09314e3d7f937f15c2ac. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTBC2488623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa300d91fd99336a98294102f0bddb231e3e6b615d6374af86fb274925779a42b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTBC2488626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ddcd0b9ed90d49b9a3c504c5e10dc401885b302a2fe5cdc2f4198413a2c5ad. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZTBC2488630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00be33e99ef9dcce3824f894889a6c69920d5a12a708596a4aa25a1b94ccac. 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/QZZ7N2488089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f4340f6bd16c4aa10897fce74ba177f9c53d36e25c8e8b032b87d61329545. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6J2560364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd203e5ceeb3778056ca671fd5dd7b62df088b61b2b4bef103e2bb7a4f464215b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:51Z), 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/QZK6J2560367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75339ec67a0859e7ff9db5ad3186bdbf626b5a5bb1264f7b329dd7b813865dff. 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/QZK6M2598093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43508fc216cef30d49ba544f5e4997f3de1f3f28a15c5731d8b61800cbddfe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6M2598094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412b7335bcee0b2150cd9eb6ea44b6713e72dcd332350d4cc33d7a23cecf24a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2551149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fefad4f4ca69d19590a98e4e3418ac05b8aee5a7ac458db838b8277b314802. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:46:58Z), 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/QT3FB2528870.