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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d316cb74dae43807c207a861ff40d8fc545bce950a653f7338cd71324050e0. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9539b219-affc-4fc8-ba8e-c71abbc4019f.json and https://artists.proofprofile.net/proofs/artist/9539b219-affc-4fc8-ba8e-c71abbc4019f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bb438a6c8300cdd9267439263f998c3a32bf60bdeed4ea1f662aebc07ccbf1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY42168588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7041648e9e5a11131bcf3c0f787454bb5a1174483534d8f6da48331730a4521. 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/USDY42168589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3675776e35ea5bfeb23f60778239b52b2e958640ef33c8c664eb79d456399c2. 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/USDY42168590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0d568c5efd88497a2f976c2f43aa6af6bcd2f87b7177f4951343d6c69af66a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USDY42168586.
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 0x20594038d9d61f720a2ecc70feb5d11d3625ae5d66754677f957b2588be2970c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJC0000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb332e296a264f51e60b3cb4aa7ac7edae22a4d60869f4c98d22c7605c3dd1b5b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAJC0000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2167d71f5ec6a706ab3d6956876305d3253ac9cbb9dd10f9f205a4dccbf3e19f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMAAK1627777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab55f86ef1760f8d6b2718a10767bdf8f513bb53069a638236cf9451ac9a74d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMAAK1627778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31262fb3ceab4adb8fcc28b41ae8b3ee8dd1978b08c89b60479b7626bb7aa054. 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/QMAAK1627779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f8ddcdee26a0dfe273c410e663143abdf28f13cd7b96374feac69c9d3e422. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMAAK1627780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecadbf3be150b9aba259baad1582d6ecb22266a038afeb2bb58619b3a5b8b9e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMAAK1627784.
Alive At Firehouse 12, Vol. I: The Unity Project
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7e7685ced699bd64b0a42d719e3d976311d0c3983a0b962a38e8223fadc801. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLGZ20900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05009acb3183a05fc37d92cc6c025ff61aaf0c7a28aa6c4a6c764b6e98f7427. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLGZ20900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984e3aa2b2a07bb0c50c8e8508d5a30d5bc737299bf674c7963619be9645e2b. 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/NLGZ20900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fbf704e28e87426a0cbdaa8b796ac6caf7aeb089ea45c74efe914374d8dabb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLGZ20900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aa090a5d071ff980675e62fbe082e0ee1b34e61c0f514df577285025ac1b5e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLGZ20900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f6d0d6eca8c0684a8219f80089cc30559d4ad4f15c24c2dab3aaf2a44d8ec4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLGZ20900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8627356970dacbcff2f3158b9cdb25bb1a04097f9da1a4bb36bbf6c1ddcb9e1. 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/NLGZ20900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39d70d866a3b231629e10a0c96de3c7edce27bfeebb62f87cd00fb4cc25879. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLGZ20900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0493796118aaceec377fa810e51d9479551574ac2c5f85d75d7e52b78a26299b. 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/DEA299908000.