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 0x41d006a8c972013f477988f5d444a1f98aeb0828491b86401d597dc965d2bad2. 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/6cf784d8-3c8e-45d0-a3dc-3a68cf30dc1e.json and https://artists.proofprofile.net/proofs/artist/6cf784d8-3c8e-45d0-a3dc-3a68cf30dc1e.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 0xbfc534c66c32a4c83c1e13dab0579574a6791365067472b760ad50d765fba561. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:05:12Z), 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/QZTAW2542165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c846df31ec5fffe7d1a10133df4f2ae6d50fa694c24565dffeb57eca92fb2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAW2542166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd87d9fd8b2756750926712c9e72db36cf2fd6fe8159215b174b8a62e78eb58. 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/QZTAW2542167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda90c660d12474ae389c3d2fce55b28e2a5ab4e3aa7eb77381c58028f2b518fa. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTAW2542168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f5caf5d4492c9df9bb52c66917706a5808ff3daf4b2cf67a83c66c8c4f3e28. 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/QZTAW2542169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38cfe5d18c52dcec1ff4e09bc920a3a0f6b4ae696317207fed93da329c7364. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAW2542170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e20722cbc194c91cbea6a360d81d71f6271a35af75d84e807d469859c12ff7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAW2542171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a3b81683e63491d1e79b822e5bcc20e906ea4b49efdc5990f24b557f5254e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAW2542172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa666254c6c8678a41f622383d093718bebf16d26a503b42805d47c92831ae20d. 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/QZTB52500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3eebfc5bbaa23cf29e5c25336b61e3f870bfcb763cf24ee2f3e4b49dd2bfd7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB52500918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe1031e8323c8aa89cafb00d6069bb2c5dfca76ba949bd52eda309b944cd6d1. 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/QZTB52500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf241a9434e61c8d66472a5e8876774c77eb56a9bf0cde28a0b078f568fafc71a. 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/QZTB52500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d1a16eee667e24670794c6629e1a8399e6d820c4017b75dab4fc75d0307f8d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB52500921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46721b939bd5061f2b4fd34776377433b914ebe4aa29730957cb60ad2d6978ed. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:54Z), 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/QZTB52500922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5041525bdf8461d6ac665cfa57836fe52d514edec31c61c30b60c63248e684. 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/QZTB52500923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a40d8cd5d2c274c1c14e385de9094ff96f182799e18aa64b62a35fad84d15e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB52500924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c05316186731740bc92f4b5f44377c10b7882a1022faabc45c598e29cacbc3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:27Z), 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/QZTB92592179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cd7a3578c5bc12bcb24808dfd1b9272e42af0fad6c909be95a3a51b4bf1f8a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:20Z), 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/QZTB92592180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8aea37bc5c0b1e791a57a2c85ab88326926ef0245bd4c5c3d8cf0d7bc79219. 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/QZTB92592181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d56bdc7b076e82fe3d248766f60df845a2697d1bbcee09c6761f5a34d6de9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB92592182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd932f1a2f7304bec59b690def964d1d76fee27ccba2f6f46e967f8e3ef9befd9. 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/QZTB92592183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf966cdf66f3dea0003e0dcbccf475542d573d688df55cc3090c96452246c6a. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:03:57Z), 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/QZTB92592184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891e5ce7ddecce046f5b19bda552d1449d2bf1a1a2cdf803552187809522f21. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:50:52Z), 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/QZTB92592185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5937806ccaa05f946646ff5c85739beea0b3ab6c15d800110b819268f02356dc. 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/QZTB92592186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350eea0f59ec4dda4cf76ed5545419c42632584422cdc5ee1af05922272deaf5. 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/QZWFM2528554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51701051fd991a7995af14519faf1d37400ce12c03cb8f76322323ba812a4bfb. 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/QZWFM2528555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190e94a84191126ebe226aa60600e0c6f55ddfe3d002c19166f70ea85879ba3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFM2528556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246773b9a5b78712722da3cc410728e63f6b91cb82d5371d7aca9c25f0ac9580. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFM2528557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6555b63aadd36dc332c74a48878ffe594c510fc1718d208e270604fe1ea6a3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFM2528558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eeb9fc8e0a32f7613d95c3c012482642dc9f17d7a71a23bb731c6d04b23c62. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2528559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dbdc12156fd918d6068c4d4d29cd24da594b9310c2f501433ddcf0312b85a3. 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/QZWFM2528561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0a42cf1f45e4fb43e1339008d214bed481500165091ee8de895a3ad694388. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFQ2539237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb52470b08821366ffd385fc95fe1b32a8ad7eb475af207090386558669166c7. 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/QZWFQ2539240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eee23fa5a8fae4993353c28099bf972a08f07aebbea24cfc4d8d4d249baea1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFQ2539242.