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 0xf618787fc6b18e7d509fb228d8850210d0a81bb367b0106efb3f18a37a333cb3. 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/f7e7bf5b-cf45-47c1-b14c-56aa54e552c9.json and https://artists.proofprofile.net/proofs/artist/f7e7bf5b-cf45-47c1-b14c-56aa54e552c9.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 0x07de18d148058fa7c9e4f70c07c93d9ad4ed071beb99729f553a156a20091786. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES71G2211510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8525c4a357dafa14c1b5a674bc8733a07f0ee6efb1b396579ea570523807a4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES71G2211511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d12af89a7ff8224ba2f9e6145538b0a56e9c87630de204872c1b7b4201d6a1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2215291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a34bc5e1d1081a5803da77feae08125bfad194255f7ab8937d54254db87874f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ES71G2215287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91bae47969d02cac067976ba6adfb1dc7a2554491cefdb489f75b753161364. 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/ES71G2215288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d2338dd7b1f85fdcac9dccd15d9558598a25e5fe7fd3763ce0f6125e58e42. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ES71G2215289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f019e799549507bb733706c140f65912b553ac0b0620d33a538c8b2c884d49e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ES71G2215290.
Relaxing Piano: Soothing Baby Music, Vol. 3
Diddle Diddle Dumpling - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8fd6692e0b8f9ed7a3c9e98af67db8ea2373733ad6ef49f3d44d7daff90543. 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/ES71G2311384.
Here We Go Round the Mulberry Bush - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338c2ee04fa76b53da730f2ce122fd4531db5e4a8ba9ff7cf06051462f91b6f. 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/ES71G2311385.
Home, Home on the Range - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09205de8406f42810a924461375c426f30f4525ff6bd649bb8ad0ee6ea0306. 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/ES71G2311386.
Girls and Boys - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cdf7ae5f4d76d2467610b311fbadf7b61aefc3f5f595604522372d70b99af5. 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/ES71G2311388.
Here We Go Looby Loo - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb270b7ce2300aa84d16f5e61363317d1798163674fe9667c476d2b51c4dbbe0c. 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/ES71G2311387.
Bobby Shafto's Gone to Sea - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f7fa674cf23ca438850f50298f6c74d6b8329c3db8a115b6342159c7435cb. 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/ES71G2311389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1bbbdbbb4ac3702d9b396e5e0c29b6c3384982f68d77727670590a4e600d63. 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/ES71G2311390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c9c032d98b4c53cc5e3f473d1c408e1f37698b0be0831cbf8d7857da9c2b97. 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/ES71G2311391.
Coming Round The Mountain - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcb5659dfef7ee188a4826313c88e2132651b93ab6a36713d7526f3cd69269a. 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/ES71G2311392.
Home Sweet Home - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d35cb3568db5cbe2fc18c8df2218828b5ec0b52b86b1a413f1ca9e81683cf8f. 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/ES71G2311395.
Hickory Dickory Dock - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b498f8bf900975c26fd2573fdf7cde4eefdfb826c36f44d16451bd4c30fe01. 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/ES71G2311394.
Little Brown Jug - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6199daec182c81547b1794f7495cbbffd2044c9569236d2d609e1bd8e1a1985. 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/ES71G2311393.
Relaxing Piano: Soothing Baby Music, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569cab730cf5141f08d312112fa17b78e3c0a1c9225222678d4d712f4e8dd2ac. 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/ES71G2309041.
Ding Dong Dell - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44feb79ad20a6e8300939ff42cc3ae311e9bd06591549cb161d04e6c89af35f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2309040.
Man on the Flying Trapeze - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb30c5c80940d5b49dd1ad47a32bdc9a2c66c8a42e07ed580c915fdb49b77aa. 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/ES71G2309042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d8469093da248e16e0e307929089c1defd9d886d44112f80f6c900be57371. 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/ES71G2309044.
L'abe Igi Orombo - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ade62a7a197e6216d19e21eb1beeab92e328cf96c663a0919bd82ef5104d3c. 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/ES71G2309048.
Relaxing Piano: Soothing Baby Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3805793ed4fbafd1f611ebe8c3ed7d1f2fdc6be7d9d42cf4386bbb3713f2b822. 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/ES71G2309034.
Take Me Out To the Ballgame - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348895bf1196ce444e00cc2f72789a08145302ac76422c620470edcba4cfa82b. 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/ES71G2309035.
Pop Goes The Weasel - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498e4c13232d375d6b060ee3153cce0c7b113f331b83aa204739f083f2f322e. 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/ES71G2309033.
Tom Tom The Piper's Son - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f7d263bbe070cf404985ceb93769fdf783f44d73e9f6b187c4eeabd801415. 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/ES71G2309039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efda7f925d6c974a0ba4d8db86bdc0c63f62c05e411e7486db436580b1e441. 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/ES71G2223787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d0ebb4ae51ace589ff7ba12633f16c1185fe447dc9abc2c090c08daaf8d239. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2223788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d7e400f3bcd8823a20dd68ba6606ec68c18568d81cb6ddf1bda13f2e04d8f6. 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/ES71G2223790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd27aac67db12d8ffc15812b4043b15793f29c2bdbfda0d5113b47304070d2c. 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/ES71G2223789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadfd91419a0e93e80ea692e42e23b714ed99d02f0ce699428b60ef2c6feb24. 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/ES71G2223791.