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 0x219da6de765cfe317b75d263c6c2e58f2f74ddf21fa6d2fa73c19dbfa5175a2f. 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/cac32204-42bd-4364-be6e-0d2d4c796450.json and https://artists.proofprofile.net/proofs/artist/cac32204-42bd-4364-be6e-0d2d4c796450.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 0xd62e3bfda4c95baa33972408d9f4ff49ec26708b2af65967e7dfbcf2716c4e87. 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/MYHV10800273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4736d06489d6eef96db6dea3a6d9a07e6f57d9a8abba91b7387bed0c727c606. 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/MYHV10600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba56bb4b20561dd1077e992595f88ac560fe1b74732fb264ad20b707c732042. 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/MYHV10400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e913123d5a8ac29e8a3064c6ac6928d5b93c8d0ae87e342859eaf4b7c5f385. 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/MYHV10600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6e0f48c42831b279a45ded57cf5895717ccdd2f4354a801f82e092d8a3ff8. 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/MYHV10800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96d5444568cdc4e8780a576324af1f3d9b1c43ccd0a55d096319f89d4322c9. 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/MYHV10600195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fa44f631b6bd7dca47728eca02fd868fc4e2272a069e6da9847ac4af1d1e2b. 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/MYHV10800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ef734353a6ffc3f938d065431d3801921724826a86ca70e42767dce23918b. 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/MYHV10800276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85060c558e991bd64668f07b7ae78b225c5ba5cf679c21fca572c626ac240b54. 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/MYHV10800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79e85037209e70a2a5441aa8edb8189bef41ad0f1460f4f70771bedcc2ece1c. 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/MYHV10800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532df072c95a4b11e20e007fc825feb284362f7f23b949b5a77445cb3c83c3c1. 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/MYHV10600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69dd2bd86a178c4711862087856c585573a377eaf6024d367a3f284aa6f625. 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/MYHV10600192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a7fa3f6827e01a0841471a84562f89126cb2adf5137901b11c204bedea480. 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/MYHV10400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ed021fd8f53b3f681bcb3ac687d12556d0d3b2400907d0eac122e950fd4a6e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/MYHV10600162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb108cbc984d9532a970d2439f0945175ca043e49f7744736edd5265b3aee300f. 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/MYHV10800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5fc6d5e17eeb1611fafab5ca302c4a7bac8bf3c3ef75b2e4de3ae605564c41. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/MYHV11301022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc6b52d6c6b8fc00cb6f8023915e5c32c0d7fef891f7eef44d19f475d8ac293. 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/MYHV11301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96d5444568cdc4e8780a576324af1f3d9b1c43ccd0a55d096319f89d4322c9. 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/MYHV10600195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30707f1e0de7136a51efff8e55446a5220799e5776869434304f49360ebff65. 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/MYHV11401489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9351d12971309626727777e778cbacfc2be9f7f97f8d7afaf3ddb0370e3f8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX201840783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe366e1d1405d4e358b698330d34c71ef1db575e383ce6de15eea8c40a73f3a7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRX201840784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d23f4405b68dab0d46033b4c6c3903212be052f127adf8a502552a640a690. 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/FRX201840790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f730e0255dc33b6f761c2920259f3368ce68de4e1c02785fcad0fd3be01d10. 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/FRX201840791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb924d3e5944c7d1282686c6ae788d62dd22dc890ec037f526f16adf09b8cb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX201840792.