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 0xbb02e7cd280ec50c7e58ad53dd20f4cf90b78871e8d4b7e02f4ee2836dbb7120. 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/9f47740c-d270-40b6-9613-2d17ed782a84.json and https://artists.proofprofile.net/proofs/artist/9f47740c-d270-40b6-9613-2d17ed782a84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Love You All the Time (Play It Forward Campaign)
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 0x1b8db73e310b9882a6e296f8f70c2467c07f4c463cefc3ba78ac653d68a59293. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USATO1600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42279c1a81e16aad14e20f3bba1ccfe7ea30090736d9c0f0933d0b2956203461. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USATO1600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e8a194e8146ce53c807dd7d10b42f5b9b62d9ee1151988b08918857bb416dd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USATO1600293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a00cb55a85bb44fca6c8dbfd65eb1a63b857a8f537f14b3424d6544e4d83c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USATO1600294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a5fe9368e3144a34964c15f98b0defd2a506dfc93b6fd2d0bf26200df5de5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USATO1600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa84ba578d6131e22256366166646558f3b1d4155e7a8fce5e13714e73156de. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USATO1600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cab460ca4e3dda58b9f6ee3a1e7b821a92cb1ba5b9c6c713558ebe9984a17b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USATO1600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783c6b2158bb39ff1d155fd6506e2b28cd9afcc199f2a46ae4713162c5ab25e4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USATO1600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328182f9540e946b3afb6654b5d4a72a89a1a76cd3f98ed4a5c82ef39ef2bb27. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USATO1600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a02fe87e8a6aed03cdecaa91abe06ca1b362ad8e5959b0d4a5c90a31cd337e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USATO1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92116491e4b1cf32ad9ab5e22688fa4fc3214a6cec12950d6b396df2a2771af0. 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/USATO1600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c91ddc6b7acc3523ea3216aeae9b1d622758093a6064c3dfc136cdf8030693b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USATO1600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ea62d4730b4f886143448c8eea828926b4cd8ad27992a0b21e4db9628a8373. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBFNP1800327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0cfe85a97895791cc3110ff34fe71b28768c15261929874cbd16c2d56c7ebe. 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/GBFNP1800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825b3effaf7c79f035e5c730507e37c955af59d2497c2e8bce6a41dd2a0dd29e. 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/GBFNP1800336.