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 0x081e83e1dfe70b9233a4794924efcdfa33eed2fa016bfb4cbdfe07fc7b0b96ba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ad50ef1-73fc-477a-a229-184d5a000ec6.json and https://artists.proofprofile.net/proofs/artist/6ad50ef1-73fc-477a-a229-184d5a000ec6.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 0x66053628dd511f889faf24316165e9d08e0d685bfcc6d5d9fd81fc0ef6a943ed. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBKPL1829570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdeac4d240cd3173ba117b02bd96dd32bb2ba50af66bb7a9f8589e7bddf10ca. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFZ41988801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837c89a1906c8f3df345b9567862059bf20b1b0f79cced3a39cca4ab7b5ba40e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:33Z), 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/QZK6N1919034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e90d557f76c515582fa358c5d1c77e8da2e4ec37ee8a5684c6587c0eefd880. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2035228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5aa7729269976d7dab03b876d0e1d8337b7a240425273646d6b1469ee489f9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:15Z), 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/QZNJY2106263.
The Sky and Me (feat. Ingrid Michaelson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c572f532b1da629c582a82731d2b9c112c91f2bd121e5760cf02c8fadb5972. 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/QZNJY2292187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb45e5f60565e3d35ba09337689db6e0d34a65cf79ab1f0565fccdb6f635d160. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNJY2207837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c572f532b1da629c582a82731d2b9c112c91f2bd121e5760cf02c8fadb5972. 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/QZNJY2292187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fe74228f819e35eb14e04062882c473fb5c1418a1455365aacb4c11f1cac7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2390095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860cf5c46eb41292d9164928c755820cdd72a501698574f00eb4b271906e2e58. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SGB502503789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429b159dc3c9b57cafb1f257d6f57d68e416cf98aae752314764e1f2c3d6cef5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SGB502508266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641c487ce7fe4384135ba84607ebd4070472df40ba3f51181a3c7b710d8cfbb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGB502508085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7640d939e4fbb3af67f0ef787893f554d7722ac95818c7f76effb3bcba9752. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SGB502504213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2c6098433a831c3034e9abe4638b6079924baa0c307a915915b115e15cc75. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:16Z), 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/SGW502504356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080c59263d7c44812ff0d1f3781431bcb07f3019a3fd10f8e49c8384ea11153. 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/GBRKQ2366770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1d27a45d1bb88a6b87e5998557e1c8d1a6825eadadafd5867fbe63ca0dac8. 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/GBRKQ2366939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ebc8e357e29e797a0f16129910ac8e8ac73b035053728db4e00d0b8494849c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2501975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d53bfec50b6b93fa30b4c8317fbfe8355e3144a4b0a5e213a67d298f85610. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZNJY2164882.
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