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 0x4cb86e87f52a65582fc737ccf6cd304346ed7a0c1282e0d144c29423be71add5. 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/95cd3311-f623-4516-82bc-25d806c1adf5.json and https://artists.proofprofile.net/proofs/artist/95cd3311-f623-4516-82bc-25d806c1adf5.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 0x2ee0a3cfe2d729b7130f072c3b3357dfbdbf874e92679faedf94db36446a6362. 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/US83Z2024557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd698e0db25046b06b695b6bb0a5fd887cd7c325317b73d355949df2e37006c0e. 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/UKSP42100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341796fdaa2d96a38f9f703bd07e38d3d62502e68dd4c4770e3952a98a361778. 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/UKSP42100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14736c15bdbafa93c137f7e74813fdd65336c09d40e8be79c6044a5950c841d5. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/UKSP42100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c77e44ddfbe0a7e3fecd636d0c8ad38feb02bfd8fe2d9cf1918878af7d3d9f. 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/UKSP42200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb49ab79a02a1addf28b98aa001d80d1526bda0346b545774130f461eccb43d. 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/UKSP42200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb307158fb2b69c11bfb551968775890903521f1fbb1e1079b6115b3fa13f02. 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/NLF712303059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b6fa1e5b013729f6c77925b72d49e8007f0d6fc8f03ea09754dde73f14f89. 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/QMFME2321722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdaaed9bd321f47c41095b7cce36a167ea8c3b725bbf78f4b4cd064c9d9fb1d. 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/QMFME2321723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bf87ee6a63069d89fa40bbf5f1bd16d5a9b406bd96a23b27956b091a6cfac3. 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/QM6N22469773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac81f2c38926b2c66e38e1f318792fbc977e8364d4b0d897d5ff5ab933895480. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM6N22469774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430832ffc12d66f3cdac4e8a34d29a7311acb6dad870efd3f2083fe53d1ce1a0. 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/QM7282586780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae13c77bb2693ae67e3fdfa5e0593ccb1596792318b2368acf9a805527dda6b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM7282586781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829056a1b97b5f9ead697c2d7c1a4cc903f66c4439a19bf970e025358137a854. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM7282586782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44453cee5b80e91c0227571093041ea426bf0142189ca8903282c4d7fbe03c2b. 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/QM7282586783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ee5210a116fc79a0119a6ad7b6afee93f3c36f14b8603dc99a069b3d593f71. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM7282586784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e96211f8b2db62158135abe820c083d44e3cca7e3e977aa4580065000d8e33. 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/QM7282586785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0dd01ac126bb95d20d98d2e405c1de6e04ab1f29767fa2b7efbbd3971c9131. 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/QM7282586786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c61b33a052eca927fee95c737a265899e3abb82a30602b67d4a9c390fbb6e3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM7282586787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93cd26d0e6808738d7d975999d07c9a8aa2f03edc43aed425014356224bbe2b. 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/QM7282586788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a045cf198c3ac9bbd64583e23ef7237f848416c8d7bdbfd6c34ff7706b88d7b. 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/UKSP42000142.