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 0x27bec2fc2b330bc43d8eb4ae8f9083d769443645a61ca82804b418992080aa30. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53c1982b-255a-47de-b9d7-0033c1d8f5b6.json and https://artists.proofprofile.net/proofs/artist/53c1982b-255a-47de-b9d7-0033c1d8f5b6.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 0x0ec890b35e74e99c2d3a9066a106029c6d28050c249c4116d69ca341f07e3c53. 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/US83Z2356006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb5a519fd72051cb72b63e2694edc51d44d7ddd3fb45adbaf5c426298a3b6d. 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/US83Z2332096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991acf354052e85e75f1778e2f5cd23819061e69f9d728b7f7e673083e34158. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US83Z2417411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25aef60bac371d66cc0d76515806b740a759ebf55eb7854abfcc4e7d18b1723. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z2417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd26fa8d7430ecc7dd7ef8a7a0fa02f0407441ef51d66bf2d0df43d2c382cdf2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US83Z2417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c301144133eb9049f305ca08e3b974110237a87f85d9cc2d58d4b99ce6b92. 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/US83Z2417414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a846432cf9d53784bce1a2c26f555c0d560eb5cb0afdc541238580b37ae3c. 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/US83Z2417415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2441fa837f9275bd05008b96a4b48778116a7cd5c02baad364031ee7c17299. 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/US83Z2417416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9399e9924aa0e8080f5336e8c20de4c1e56e9c92cec99f9b7763a919e3a193. 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/US83Z2417417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a12ae768b7cc4e20129d59242bb8e4eee7908427413b23cc82a5ef1755043. 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/US83Z2509684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66cb3d85ff6f4642400d93615b093438137f0d682b1435246ac99c77c08d54. 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/USLZJ2539390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f17bb480e9d3959bc8f81b72f89a4a23a033fdbd5519bbeb9a5ca04254cac0d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US83Z2501750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f26808450cb8705dc0830f3bd717053be1bd7e7d561e70b916d8803cddd265. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US83Z2428237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc561c8365cfc0634f9892b75877a7737fc70729af3d5305504c33512a0682d. 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/US83Z2419936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2441fa837f9275bd05008b96a4b48778116a7cd5c02baad364031ee7c17299. 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/US83Z2417416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c301144133eb9049f305ca08e3b974110237a87f85d9cc2d58d4b99ce6b92. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/US83Z2417414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd26fa8d7430ecc7dd7ef8a7a0fa02f0407441ef51d66bf2d0df43d2c382cdf2. 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/US83Z2417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92532f9cf7e579304abf1bb30b63711b5eb30ad98bf8bbdda8a2e049f7ea69aa. 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/DGA0R2411232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25aef60bac371d66cc0d76515806b740a759ebf55eb7854abfcc4e7d18b1723. 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/US83Z2417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991acf354052e85e75f1778e2f5cd23819061e69f9d728b7f7e673083e34158. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US83Z2417411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ec05148742cd89ed8befbfd6155f30b0228472c320e70c06afe2efb1f0962. 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/US83Z2407746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174c5f4280d6e98e78e64c2a179b3007728cf1faf8c36eff70521a9b08efdf09. 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/US83Z2493800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6956e46f372ee641e35f10aa7947bcafea9bb02cd698936a57d71bba1d66875. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2487210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8e012f5b1fd1d6673e6d9e92f57dcf10f8925a3aa9998352679db0053df40d. 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/US83Z2474013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29ff0f77a4b040bdf46ad6141ab5a09f2781dc31ada8e206779f7fa0d83a56b. 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/US83Z2464490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41910958fbb7c1d02c9990035cef86df60868d10f97360a50bce9b204665d236. 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/US83Z2469762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dd909f7312f71bf541af0a2e5197ca04444e5bc782b8b26895af4a54a6ddf2. 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/US83Z2353699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7b96dafd632caa13b7c9a8e95b759183492d07ea1d995929799dbbff8a35b. 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/US83Z2349410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615bbb895c2cebfdbaeeb6d36655af122928a9299e2aff42b6adb347f3ad7ae. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US83Z2344019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3360c2cd892e916e5bebea765071a10e25f8b11c25a4ed22d8a918b68f3004b7. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/US83Z2343692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f672b06063f77d98292f359ae1d87747d179f602197a85c31d8c48366bf3e. 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/US83Z2338880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f8824a04ee17a804ae7e6a6c4c63339a1d47c1b12bcca7bc5749ec46846db. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US83Z2328547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce2ef9a72bf6da07a9df37eb98dfba7eb6fffc8d597aa4615ed269e939eb1fa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US83Z2312957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3360c2cd892e916e5bebea765071a10e25f8b11c25a4ed22d8a918b68f3004b7. 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/US83Z2343692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615bbb895c2cebfdbaeeb6d36655af122928a9299e2aff42b6adb347f3ad7ae. 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/US83Z2344019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7b96dafd632caa13b7c9a8e95b759183492d07ea1d995929799dbbff8a35b. 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/US83Z2349410.