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 0xd4a35d13d1958899224c13f67c89e1136c1905793c9577ffcc7903f3e6c188ce. 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/ecb2f0b9-879f-48d0-9066-2f311675d873.json and https://artists.proofprofile.net/proofs/artist/ecb2f0b9-879f-48d0-9066-2f311675d873.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 0x8b9a2be95707971543f9aec6b59b1d3f8d39c7a1cb977ea6d213d3ebec15f050. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZ4JJ1682467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26d710f7a968b27f822ae53379ef6821ced8d5c1034191b0b99ff3dc45de2b9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZ4JJ1682520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d8720b82ddca427add2b0ec90708cdc19dc32a9ef4faecd2f2b5b357b6a06. 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/QZ4JJ1682523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ebfc70fb561a6a79cb09bd8f4bd34170b857ef9c490db53b32430b01fb318. 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/TCAED1927602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517691045887a28306c0b6a64be6228da2df2bc76366a5cd2566943415077650. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAED1927603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79c311f6b4905f662c8d313ec0556695cb046bbf634bc4e912925047e29737e. 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/TCAED1927610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8d39a778be7fd76f5e7aeda0b220267beb14882222500af9e45cfa453ae503. 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/TCAED1927611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba8924606b1ee58c42577dd1cb6728970d7101f569cd057f2e7be3b4ede39f9. 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/GBLPF0258124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0150d44ca2f9426eaabaaa7ce707f8802676c5bad9003a1359759b632268dc. 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/GBLPF0260989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af8625b295c12884a0bd3b605aefae811e2dd65ba5d5046e5019bc60991966. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/NL1LE2001136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17cf30c4d1145649d4eb9d57dd95ca1b8ea720b4981931a4628befcec01081b. 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/QZK6J2099536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8876a13fee4cc4a9a0b863ebcba595e1c9664c94ded6833897feb360cd5a32f. 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/DEQ022118409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6d9e263c0e5ae2d00eff8196d38976e218c84029264e7f5725545714e85e6. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/NL1LE2102538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835329f3f4fe2c8c8222b4a8116582c6a951e475a0961da0ea408d2205c8d4de. 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/NL1LE2102540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f3760f39fbdf3e46e96e97767b0371fdc16811fc49324f3cc09696be60376. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NL1LE2102541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac88cb2254b745837b5a4d55598ea5e3f0a1038fc9a3b8bbb7921df85bbecb3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NL1LE2102542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa197144212b230941a008a168970f9ee95ef8871421c2956718f9b8c866840. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/DEQ022381851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9165216aa405974bf8524e051a5c9007ca12a1996895b51daf58e8afb9308c7. 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/DEQ022381852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf16b1fbea3d9e1c880bfadfc6cfb52311673afe040a4787262cce98d5cb363a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEQ022371887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c3e61042c001bc6d02d28a633eeb1cb15890ab2055d6e6ac437e1fdfec5f7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEQ022371888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a00d7f6b5c7d5ee4199c8ceb126809486d5cc7c3b0c8c1fa6bc086b9ad45e. 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/DEZC62583020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e0019818ef640f3b5a42a364bc121e4f9603aeeb713a84b784044e66de102a. 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/GBKQU1916700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077ce10d97803c9cf5aee503dc7856fdb23a6cc900306da447b11fc01d23a878. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFC2038803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ab2955b4c3412041964e00bda2453b756536345e5835f25b959dde2e116beb. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QM6P42375194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c13953084a6c9e8746f88a73931f4f9d9ebd8f9b9156665a66f993e32604ade. 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/GB8KE1959978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f76ac31e6cc3ea2b40bfa5fc4edf95f306ca6b4a388263fd7b20e109b374ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1916909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ab2955b4c3412041964e00bda2453b756536345e5835f25b959dde2e116beb. 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/QM6P42375194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5387b2344019a5b6c73aa6389e8d54fb26242ac892a3e26eab15e80e9885c45. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZANL1726744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac99eceb4ce28140903754ebad5cea59c4e02228a16514a208e05b220db7cb. 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/NL1LE2202573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71dec658e436ecfebe2a901aa3ad593d7ae61e8d863d5d72fe6fd9f0d20058f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBLPF6783461.
Project​:​Beatmaker - 1 Year Celebration Sampler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1ea567448761e7562c42fda1da7b48a8630e2f4bee3ae4a0c6a5449bef1c34. 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/GBLPF0601667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ebe6bd88c190dcd24a2268e6c9a978d9f73038ce44db4fa8e1cc5807a34b5a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMEZE1708127.