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 0x8ccf0698a06986319aac19b021b5716bb97b606f63c3fa665635df6545fad0e6. 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/c04a2fc0-5389-496a-9596-04e57161b8f3.json and https://artists.proofprofile.net/proofs/artist/c04a2fc0-5389-496a-9596-04e57161b8f3.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 0xbb689aba8cae1e2d46720f5b6cb30d3d5fb6df65b7c278767c5bc78bead64fc6. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBBW82000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c77652daa70a14353173a7517ccd2e4a832e0c660ad4293ac727e4467cd37f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBBW82000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b12ec4dba722c0129339893f18716c6e6e50412e2c2b14cf1c9fe672c357888. 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/GBBW82000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d613ee071848e6b806422264037086ab5f8d1527fd5be72a3d8fb41cb02066b. 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/GBBW82000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31175dab7ac7ae9f8ef34584cf435a7b14f1ba4e822004e8897f8b102268a84. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBBW82000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f77a1ffd438f3f9665992842ccc9b67ebdc8e6f0f94077682f7e27e318e67ac. 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/GBBW82000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463d10fc1bc70f45e11238fc987d6317bc3f18ec06fcd6d9acd7eddd1dd4dc4. 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/GBBW82000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b82be3322263b73dd5e5a11377157a9129cd257ec2429fbb66670c179262f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBBW81900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b916708a02a7f7ed2402a25043abe7f115089ab8e1b31e9ad7f430b148e692. 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/GBBW81900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730f583308f84bd4fcf17c050ad531cd848ad9d4fb2dfdbb2ee1a41845885c9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBBW81900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2d4f41514fe5ed83d64f95af775bb703c48e0c8e4bfe5757315c60832a8dc8. 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/GBBW81800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6440a14119b63b2b027265ac2359ae9b162d9814e61ee8f4d41cc1393b5a8f0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBBW81800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c4233c885077a9435759a27df76a75f5167925856b00f1461cc118f5ea5924. 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/GBBW81800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7311f399370ef866f608295b328c9217b55e1dcd6dfa771bd522d64e8a4553. 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/GBBW81800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a150e36690fe786d4170fd59251de1b06b9dda6a31e29d3d2d5035066a18664. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBW81800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36028910e84daa38e083f9a8a332764593304f90a746f1c1cc64dd53886881b. 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/GBBW81800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae46f21a9cdfc95d8a2095fbb668a15a9c8afcf08d6546e638d13b2c276bd0. 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/GBBW81700110.
The Balloon Song (I Swallowed a Balloon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfedd15a5c361dad473fe87c3b48f442ba5ddb7ce372d7a0ac6e64e82cbed41. 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/UK8331400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b029136fa366dc32170a5da2ed1baa26371c006bc3aea3ddf6b553b64411ed9. 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/UK8331400004.