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 0x2945cc6e2e9bc0940ad0aab2d1ea5c45a403ed821aace6dee764df168bd5e0ad. 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/67146218-40ab-47ed-ada9-c584797dc91d.json and https://artists.proofprofile.net/proofs/artist/67146218-40ab-47ed-ada9-c584797dc91d.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 0x1bb9ca9d01f2d723ab176fed35a816c6467713332e22dc6ff1d9a4abbf4d9cee. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GX4R52314358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e37f7544576abcf27ccaede06db18241f88c1f12f93eb13feb40adc6f1d84d0. 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/CH6542391537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f12b6869f048c820a5705cdd347081e2e172260759658356cb4daf54f0172. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GX38U2476073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7e1b2ca9d63659192cae8fa337736b18a44cff63ecf56a18161fe4de2083a. 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/GX4R52421320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6fe676869dec08ec6468c4655027c52bc04d28be13aff9c0b13a30edd1f16d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEUD42549509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692f5a20cc6deb9f8f22ab9c02c2ec98d30a4facdd01200687c4ffde1b559978. 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/DEPI82407102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5713c4dd1ff27bdd10486ca56bbe3c54f52d1756b62f44029fc8914184162. 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/DEPI82320123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5dbcbc99749c3db1851a61f8ed6c5a837a902b147029d9599fa0b6ccb0226. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GX8KD2458032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4048f8dbbe80bcfa076c563f4674fd8fb63dcef27c95fe9c788a1f03642652. 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/GX89G2497255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf44e5ea5647aea417d07ad61257888b12a7f895533cb2307d04c91a8550b605. 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/GX89G2459474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ae190bb170be1c3db46ab893b12cc580af072b50dc06fab29023b8efd8cc6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB8KE2302306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe408d4832cc6194693af6b4d1f03b233db1a4de4f8a3d94b162f9924fc9fd53. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GB8KE2303502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabc2a1aa32dad0b5dcbeda55e194d6cd7834951539e0543aca004f2d100f089. 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/GB8KE2303503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f52da737c6d58b14d366dd835bdf6bf64f23dc52219e5afe74b1a64db1d87d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB8KE2303514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba9146289a1d098ffe97a052ce1717a810373b6d6781df99104064e13b85d3. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GB8KE2303515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47554fe96731f9c99d67d759596b5c1ee35fc9533c3a60b84b09ef279f2cfb75. 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/US38Y2309965.
Project Xmas (Christmas Dance Party) [Deluxe]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47554fe96731f9c99d67d759596b5c1ee35fc9533c3a60b84b09ef279f2cfb75. 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/US38Y2309965.