__NOTOC__ SEL may refer to: Signalling Equipment Ltd, a trading name used by the British toy manufacturer J & L Randall Finnish Food Workers' Union, a trade union in Finland Left Ecology Freedom (Sini
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 0xfbf179964fd4d4b98e414e9061f14267ffa31bec6481d67e8bb1d457e4030071. 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/5989a04d-51f1-40e9-b116-8a1deba94599.json and https://artists.proofprofile.net/proofs/artist/5989a04d-51f1-40e9-b116-8a1deba94599.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 0x2a4ec1700c9ab15f1499aee0022803b5179a91bed321b541fe9c8d3404803624. 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/TCAET2011628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdfc26eb0b84e7104009f2b28331c618295162a5996ab38fc786f563b5594dc. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAET2011673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f8db84ec8c8f6e76ffde7dd3ed04b7dec3a2e643a9153e8500f22cd91ce0a. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/TCAET2011718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec67024377e22c5f403ed64e3bd321e99c5cf5fa68d151777ee4c4a62b537fb. 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/TCAET2012055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda716837c5114b54f482c50130a37a6f2beacf32a30ccae8956bb6c35c6a6a4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAET2012234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab18f2292fc72888ba21518552647646d8ccd913af70130e9af733c0d9f90653. 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/TCAET2012264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a1986dfc831ca2495124b240e24d9939683cf046cf7791e192613ca0590edc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAET2005449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4818adbac5219a88c60b621cce9cb21aa9d1f62cd6e40c9ec945655d3e0dd7cb. 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/TCAET2005455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dc9236bdd78a0107052a6167f8a03d0de8a128ddadd8e02e282ddb04c67794. 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/TCAET2005464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a282ce6b9c35f2ff242e2eb16f23daa4168f588b7330e4f5710b97dd42f32f. 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/TCAET2005475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad2dbedb4538677691435708026ae0984bea701a464428126857bbd8d2567d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCAET2005480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0b42f4c151643f175a11d9358b56ade76444b1dad7a60fc1cd5e1e3de5c42. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAET2005489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38278909515f31f5a42f36ac9cb2b934c7ed26880db013611cac90c510d4d3b2. 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/TCAET2005498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ae2f2ef9a53ea9c3bf144a9a9dc950d53e975b74f723a7c0d724c459bfadc. 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/TCAET2005530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b4757ea22653cbd125abbf446c362352c6a7114d6f33e95b5e5f0a688ce09. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAET2012863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1364441d70ecaf11e1a5f04f6a83a756159f4b2c43b8e1db4693b7159aea18ab. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAET2013031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2164b8a91c82c93a4028941079a18c28a470517165306fa5242292251f8817. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCABZ1430524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda0dfe8a274fe72935d56e3f51b7ae40aa3c8d35b7f351e93e1309a16904863. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCABZ1430527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1337ae57fe41bacebaac97765a392cef33b93b39df684a69b76262591132f2ed. 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/TCABZ1430530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11672730a3efdaa0ceecfc2389c28c4e14b302a4f97806b720e6531d868d9ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCABS1379329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd9d0f7a9cf4b052486251ecea583fb9c17a466621cd71e69b5ea078ebdbc8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCABW1410183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e5fed42efa2d4f8b387dfa9233e3466e1d264fcdaee700c2075427b3f995d9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCABW1410189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef71c8b7c61068a0489c93df7b9420685d84453f19ac1cb123342ea6845c53f4. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/TCABW1410200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c157e9948097a5a2e7cdc2c66277feced65da6c100ce79f5288ab15bd31fc9. 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/TCACC1447767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fcea7dba05b0e5a4712dd9efc50ea7918ed97be3b1e405d8542a74eb412d0b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCACC1447774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a714c1dc8561e432ec99898dc67b57d44186910b02b691e639e4aa637f5c7a2. 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/TCACC1447785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3812baf685700b69d21d8e114c7671099036fd3d3b4a398215e3be6a70f8b8e7. 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/TCACC1447787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5df208a1c46d7eafaa78cfdfbd8f9ac4b8190f023797ff73f8f10939ff05b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCACC1447788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056d0a22f682fe113eba232d0a98fab5aff1c507683159293793978b86a82d6. 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/TCACC1447794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c39c2922c5560625376beacf25daca54266aeca938572f258c3ab056d15a4d. 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/TCAEF1942075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d1b8700fbb0460068decdc195150ad4762d53f7d65f0374995b456ad371e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIL2408364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8494099e6e60824b2b453bfb30dfd7545f5e6032f2ab638dccf6eef97bc242. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADP1889625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1025fcbfe42ae1ef6fc477ee27cab62e31430732b12e1cc22f73e03fda8164. 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/LTA401700003.