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 0xa7e534652a5f0640d00099cdbb60eb3a6ccbf3c3fe86680f1bfafd1224bd1e90. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65827876-4508-4fc1-a09e-fee366e04415.json and https://artists.proofprofile.net/proofs/artist/65827876-4508-4fc1-a09e-fee366e04415.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 0xba0c6b2bc655153e0bf54ba57f216b60a36ba29a429e7417a22bf67ffee411d3. 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/QZMHN2425643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748850d7e321ee7b31c0ea985a87795481138302dc0448bf0a60c5bdd4f247ed. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2431878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57f2cebaee1ed39ad38f640dd94e51b2c368c0a6f2eccecf428f52f570fe41. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL2QC2101160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0084e2536d95db8df10b5d0470245f944fcb8bf399c3accdbd3740bda664dc. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZMHP2356111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bb4605f5c5f2628625de39f5070057959362257b69fdf00e9b184b286d221f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMHK2307622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a513cc397cae0ac65fdb67d7d8dcf39e91dfd82c2a09107dc04ede276ba2323. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZS652277992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60b22de783c86fcfa6aee3cab4e31f68f591e5d1dca744d726ca8a562bc0b0. 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/FR2X42404624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a8a3c5b25795e357d729cb2b04a2f38f0af43ca4db0ac5cce75591508f30b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42404625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0eb3b4b06dace8bc545b25060b7591bfcb04ee80f04b3381bed20b388b0fb2. 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/FR2X42404626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3dcbefe2f58078c36accaff1635ebb57924bb7f9f4eec565b846be71ace53d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42404627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33875c8ac070a5a368ec92b71418626734dd7df71ebab9bc59bcb104c377d74b. 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/FR2X42404628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff25ce08230d8d77deb562dd8e64ae7b6a449ed628cd55edf9ac65eb7827b0f. 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/FR2X42404629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02f225fd6e587a92726a4e93c51dac92f414aa11991bb974d237804267477ee. 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/FR2X42404630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa5ece1965ccf180e20bc74eba9093c4465d58500f55f2bc9542c62930a80fa. 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/FR2X42404631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c5aa596a90400b69cf642f3b1558986a5a389b3dbd89cc11383de9af937f86. 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/FR2X42404632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eef27173e94a6359375586f59fcf2cf3b0593edd476cdac58427817c7de112f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR2X42404633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7625f2286b57f560e427d4ab19670edccdc237c29cff278256ee3b4297aa48d. 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/FR2X42404634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16d092db94c9796dce0b89cc643c31c9d363b8319d42676ba12dd00ca182c08. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CH6542431644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe9984289c82eca028d6fca707015b36cdb20e71a5bc65a97ef6b3e996ba123. 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/CH6542431645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e63a680245544856f0ad5e9518a2b2cbc4dbd2e3109a8733ef4c63db5679e. 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/CH6542431646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033e4c3e33c77f61515078d164dc16b0c10243088145ea28899806dfc262f490. 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/CH6542431647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe3e831d2a889f03988dfffc2324f01b4d6ecccb1178a7abcefb327f2997cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6542431648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31538ac5ebc0c27b64edc297e23f83b39d343ee3bcb1289038e13501cb060a09. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CH6542431649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f3b1ee49516e5f3451701244f4b6a4ff38695e56af36b8eee362e41c0884e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH6542431650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4752094193bbb206ff4ddcb6cf8e1a01c50003b32dc5cc32e0376ef40c3c2111. 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/CH6542431651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb824a3c962a25209d06e78b3f87ee876e2e9c220e266e64a3e62bcb93fa2c1. 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/CH6542431656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd955a24c918033b27fcae70d0e0495bfb10dfcda05b38c92a00140a5e80f0d. 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/QZMHK2037173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f126813b4bc21f17973253797aca0a5a01ea491ba66eb4775e6306d683d0d5. 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/QZS642231184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa462370ca93b15467fd87ee695c88c48f120e58ed41a9b8478dbe4d72fceeb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMHK2283810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c81880aec722761c1be05127e2e4e74d82b0dea5d40e1072e815d43941b6b8e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH6542440386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9b68d0bcdf3a9f5e5416591f3ceba8206afdcb6de4200215d9337579d73710. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZS632475834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2271f16ee30aa303fbd9d4b0a1ba2989f50729fa1ba28edde368bb2df72611. 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/QZMHN2088413.