Return may refer to: In business, economics, and finance Return on investment (ROI), the financial gain after an expense. Rate of return, the financial term for the profit or loss derived from an i
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 0xa7d557c05a84852db701385cd33061007f367fc0596348359e04888c248ec6cd. 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/7729f43d-b73f-4471-9635-84e90c20640a.json and https://artists.proofprofile.net/proofs/artist/7729f43d-b73f-4471-9635-84e90c20640a.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 0x993ab6231f5835928a9d9289e640b41d49be5bdfaca7131059399dff40755abf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NOAGW1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57589253f6143827e927d429fc93e81d7385aff53aabf8106767ee6a4da25fd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOAAC2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01963f219058fe263ee63009a36bd4ed3bae3f9a860d4209702afd09ca0ae13. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NOAAC8801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd98e7b994b1e94997f2c0984d66c7ec10fc7652e09189fae5900707678fce13. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NOAAC8801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7184636e65dc4298c931f9979c4b65a110fa5eb0c427b7090830ee22723e8b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOAAC8801120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce68a108413666044e0dc3f6a529fbe45e425ad37607f3e7c27f3809a5d20c77. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOAAC2001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b11443bd5706839e69fb30869e93b21aa3655fc0e65ac5f41c12f12d400557. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NOAAC2001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a53cb44973d20c2e7e655a243a6cc522e564d9ecd65421275cf1afa210411. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOAAC2001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189b34f6734facd50a592071f9124dd4460afc3eaf348c96269706d40ddb21f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/NOAAC9101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e70204aa5289b80fdebf50794d54a2e25b1d610803f6cb21b98d10228eec74. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOAAC2001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68debb5d8ba951e7565d4d56f2eab0e7c73c946d28fbbd7eec9203a95b7627ad. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NOAEC9202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e29489d9175da0207e660c7ef8646d80d28c75903904da885107174cacde87d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NOAEC9202070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6034ea8f4f1db2cc80251a6804b401c1adba25bfadd004e034067b918e4bca47. 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/NOAAC2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b30e7328e2aca7e88ac45767698b2d19246da0a0fc9ec56602c04f159c5e3. 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/NOAFE9702010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57589253f6143827e927d429fc93e81d7385aff53aabf8106767ee6a4da25fd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOAAC2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951127bcc563303f3c4aff31a0676375b80979914998a3503b3eeaab41828ca4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NOAAC2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe59aa30db8e3853f8e77bbede38370a957e2db3467102dfc4e1656148f229. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NOAAC2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a475c27e358d12cafe726fc6d1baf31ba7cf539294f1e35e1ccb6e314d7f6c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOAAC2001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b11443bd5706839e69fb30869e93b21aa3655fc0e65ac5f41c12f12d400557. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/NOAAC2001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a53cb44973d20c2e7e655a243a6cc522e564d9ecd65421275cf1afa210411. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/NOAAC2001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b52e2d7827dc7592b4ecee6d823f4f0da39252f0f9b13bc8afd80857068a0d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NOAAC2001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965b5a278810b04871ce7cb2bb543f48583ab108af057687b21678f53c47cf5c. 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/NOAAC2001120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33162bca6388fe2a77a070b5c0475cb8a9cf8acf46c35412df260a574355f03. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NOAEC9202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6f6372a67087692cf59034e01b8e4473724f9e8e157518d58d149c271907b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOAEC9202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c0efbfa71a4b7c576754f64303cd8c8ed0bab450d2b86fc05caf48f97c08e. 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/NOAEC9202050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5b9a8187130ffa9913dd6426d403fddda2f093338bdba89970034da4c0081c. 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/NOAAC2001130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7977f7bdaec855b6f4b3e7b79f7c54142ef8343f9e25184d10b20434ecd66. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/NOAAC2001140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951127bcc563303f3c4aff31a0676375b80979914998a3503b3eeaab41828ca4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOAAC2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402238e671e28bb95ed5e02046b9423bccdf177e30a47a8b0b4d9d1b07c73144. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NOAAC2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe59aa30db8e3853f8e77bbede38370a957e2db3467102dfc4e1656148f229. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NOAAC2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a475c27e358d12cafe726fc6d1baf31ba7cf539294f1e35e1ccb6e314d7f6c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NOAAC2001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cbea3050559c2f63b6f001de26f8a13a4d9024a48f5ba67e5c519db275bdd5. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/NOCEM1566010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87654bacb6a7ad41d649da15330bb1b53a39ccdd28fed8c7be4ab54125cc52. 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/NOKGS1401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4975495f952a2e105f97994deb7aa93d028308fd9e0b06b997d84b9edd855. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOAGW1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32d70a36c4a47ee0501e7a109a892d4f8fd52f0ce6debbecc9d9d67064dee67. 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/NOAEC9202060.