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 0xad1081a282691c521b799d362f682e0c4f9894e86eae05b7e79ef6f00a979e9f. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faca4bb6-6df4-4fa7-9744-b8c4fdfeb0c1.json and https://artists.proofprofile.net/proofs/artist/faca4bb6-6df4-4fa7-9744-b8c4fdfeb0c1.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 0x0fbba6ccf441fc0f078e230f82f7ee8ce510d602eae2a2867999d5c1cfbc9b59. 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/GBY7P1100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da57bf257a2edd82305e68952436a0e4451e99fb35983dd5c7a98a57f007252. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBY7P1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656157817574dc0d6ef38d0398ee815c38e12e9bcd72f363ea33c2df31c3d057. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBY7P1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b159adc3d4b1b2dd4af9d05ac2b98721ab127416a15d0ce1164cf2c90b0aff5. 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/GBY7P1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb0aa44b7fb6ce881f07c59d4147c4a517ce4c25d8e9764e4e15ecdf8d0639. 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/GBY7P1100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0df2d4ba01ac30f58f55e96e03eee225d0d0ac9b52862a0e5dcfa1a6954e4. 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/GBY7P1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8275b2826c5dcaa1c955793f91542fe65c1c78be168ca9a7b5d4581fb4a72. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBY7P1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafc630cfb61f71aec678ce5176edd915de8b3e48d2450d0085f22b0897890b. 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/GBY7P1100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2894d076e0073dc540c87aad5ec60b98fb0023c307384fcd63e7510e314485. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBY7P1100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86843d3999319c90789ceb1602c9c60c5bb90804e97b4d0e7242db4504f4069. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBY7P1100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b2b9063b9121015a8e5a5ad698e20cee3833a4a6b7f5fdce282ba18038e6a. 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/GBY7P1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7190f742062cf9e48e85eb71c22e2ac5e01188aecce469ac88dffdbe12b6ad0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBY7P1100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cfd2d596e65468f12ea857b402d0fcd9a7407a767ebcc82790d07e29f766e5. 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/GBY7P1100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09780119cafbabf79bfa73eaebc2863e927e240b5e9f2da8e3cc6ec5b690d8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBY7P1100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee13a8afcfdddc9394a03b917d5a7372e95a61185336b35149443c19caa13871. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBY7P1100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad137b5740f83be3783cc44c41513760cfd124f625066f84555eca844cafd3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBY7P1100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4402102d8b6058d04105c040d495c24ea824d26ddb45a3430b6d99b0b72352c4. 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/GBY7P1100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0399d8aa52af5d6fbcd6fd54e1007ddb076378208915491a30286da4ff3289. 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/GBY7P1100001.