thumb|A toy motor scooter from 1955 A toy or plaything is an object that is used primarily to provide entertainment. Simple examples include toy blocks, board games, and dolls. Toys are often designed
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 0xaa654cba22d244ee6f89ee1e802ceb27a01a37bebb6a0784e94089f3043c7ab3. 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/6595fbf3-5c63-44e2-b291-52f8972a81d3.json and https://artists.proofprofile.net/proofs/artist/6595fbf3-5c63-44e2-b291-52f8972a81d3.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 0x9b033badafa73e786f959756dfb232ab95dcc763aa8af793af1bb2ca90bd2ca0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBUM71202747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0fea6896ab9774bbf1bb57b859292ef70b703d7dfb508985962f02bac88f0c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBUM71204169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967b6bf71aae9f7c239c6f69f9277816f7629ec495d34e512ae4bdfd9b9b983. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM71204174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265dc55bd30429fcd49cf38180bf1f0dafa298dcf78dfcc4c0e0dda345d99bb8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBUM71204170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f26d6900456f284f01029c0cb2f2225964366a4eb3f556a3b17b33a24e4922c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBUM71204171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a059c8aa1b52c6b9ce6f0ef6dc7d759174d7f7184ffd7a0c33356351bd997. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBUM71204172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357e8bfb3b3c1e491ff7d6f4a60f74145006430cb4499a86ba70c2c8e9a16b0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBUM71204177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0ad8e61f0bde0d2b0993da55cc4d389394156f0add7504839d71494936ffc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBUM71204176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55aa3c58be42dd63bad4663c51ac4dea1a037004c2ff39c65f3d24ebeb44bd9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:49Z), 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/UK32S2222294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334e6e8e6574d44cca68fe67a13df8618f7612d878d6bb10b9d7e65dbe192e6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UK32S1500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca1a20ea0350154c46a800a24f12b40d0df9e65edca954bebb8841ec9136444. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK32S1500322.
The Half Remarkable Question / Ride Ride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77fedf0a4b7ea1b885c1a86d2754bbb7357415f615ee6ebd01df8e2c7510cd6. 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/QM6N21870381.
Strangulation Day (Cosey Fanni Tutti Remix)