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 0x22c417b1fa1669e2aa0c09a1974af19e56f5c62e762a61e8634e9a8e33a762d8. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9e14676-cc56-4e94-a887-31a8f20b6921.json and https://artists.proofprofile.net/proofs/artist/d9e14676-cc56-4e94-a887-31a8f20b6921.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Baby-Go-to-Sleep "Stops Crying" Original Heartbeat Lullabies
London Bridge (feat. Cindy Richardson & Cindy Richardson)
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 0x8312cb97e4f3e9fd4884135bec74264b194c255df23d7bb7452f5af99562908e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085270 — a six-check JSON result.
Rock-A-Bye-Baby (feat. Marie Tomlinson Lewey & Marie Tomlinson Lewey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dad42331cee8aeb694bb856618d7755dfb76de0b18868469389531629f205e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085272 — a six-check JSON result.
Are You Sleeping? (feat. Terry Woodford & Terry Woodford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2ba022a0c10a1407471c051f12b73d1f16ba0f81174409d0bce82980400c4. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085273 — a six-check JSON result.
Lullaby and Good Night (feat. Marie Tomlinson Lewey & Marie Tomlinson Lewey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1050d5e35b530999aa687dbdf90840a495c0f087f666c52f6c387f2bf3f119a7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085274 — a six-check JSON result.
Twinkle, Twinkle, Little Star (feat. Marie Tomlinson Lewey & Marie Tomlinson Lewey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f0436b5f63d0748bb65870a04b08032b6f7b8a91cb5d1526837bf4d731dab. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085275 — a six-check JSON result.
Row, Row, Row Your Boat (feat. John Reeves & John Reeves)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b80584d9956e27fed0df1f0f3abfe5022ed12f49e841f061c957df6c7a6c9fc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085277 — a six-check JSON result.
Mary Had A Little Lamb (feat. John Reeves & John Reeves)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f882e402f24dbfeb48cb63446c3845ee6116833c623966402825782ee153ff0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085278 — a six-check JSON result.
Hush Little Baby (feat. Terry Woodford and Cindy Richardson & Terry Woodford and Cindy Richardson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6aaac987a703d7b94dab2642696c64065d48d2b3e823b90bc5cb3941c3aca. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085280 — a six-check JSON result.
Old McDonald (Had A Farm) (feat. Paige Woodford Gothard and Terry Woodford & Paige Woodford Gothard and Terry Woodford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23c4d957510ac9983dd83412cffdb8af2a5b64d301351310498b7e33d314ef6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAR1085281 — a six-check JSON result.
Baby-Go-to-Sleep "Stops Crying" Heartbeat Nursery Songs
This Old Man (feat. Paige Woodford Gothard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c14ff319c4e6b2c3446021bf8f3516ec8b92a355eddda4981fe2af73308a8c3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1123582 — a six-check JSON result.
Ten Little Indians (feat. Cindy Richardson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81054d4b85ff1ca82a0c936a34c1cf277dc06d903f5d8c60271597cc5c27321e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124313 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d301f11d13bd2632864a58e2c481afb478bf93014b511eff061128f1bf976cf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124324 — a six-check JSON result.
My Bonnie Lies Over the Ocean (feat. Lenny Leblanc & Jill Woodford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f1fad4d2161d605a79f3977f834db22b2d5507923fc49ed91c6ae372a6e0a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124332 — a six-check JSON result.
The Farmer In the Dell (feat. Cindy Richardson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ea9124e983c22379dc40f31aae98dca09b623db684efd8205f26b4d786c3d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124344 — a six-check JSON result.
Yankee Doodle (feat. Lenny Leblanc & Marie Thomlinson Lewey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614134f134a9d27dab1e91934123bddb0eb907671f7596b9150c8b34ba1cd65c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124354 — a six-check JSON result.
Baa Baa Black Sheep (feat. Paige Woodford Gothard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f69aec9eada00d90362ff3a2275e2ca3ba75c18340c9158a9bd9e0cbbf0d12. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124370 — a six-check JSON result.
Sing a Song of Sixpence (feat. Lenny Leblanc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89107e6a98cbf005420f1a20bda6542189194f4ee5cd26e701bf2ac1938f2884. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124374 — a six-check JSON result.
Three Blind Mice (feat. Cindy Richardson & Terry Woodford)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e4092e5d679114f26e3a5d6953a003534babc449a29887c72fe45b313cec5d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAAX1124378 — a six-check JSON result.