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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1210ec94435b662bb1339418727dfb59b9a8b8aba38c1974379d915ceef5daf. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0315d41e-81d4-48e7-abd3-bcd185d23264.json and https://artists.proofprofile.net/proofs/artist/0315d41e-81d4-48e7-abd3-bcd185d23264.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
zZz Encouraging Nursery Sleep Compositions zZz
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a987da0ccd8f2abd87f69c7edccf39dd8da54400c0910847a39399df431b2f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZAKB2012585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b86fd271b24ddf439f1eaa17606c958bd6174c6dbac0641add67fcda26e12. 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/QZAKB2012595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c523f1fd4b1995b7d37cf546e8f1aed3cc09e3aa81ed4ec5039996f370fe8d2. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZAKB2012588.
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 0xaf869979d9c581c567a83aeacf174990c0f4f0e995b0b374e0d7b496e97dc595. 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/GB2812010963.
50 Happy Baby, Happy Parent Lullabies for Restful Nights and Days
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba1668422223bd4cb09a81a9c24ea2472bf885c092e960cd0057a5396d215e. 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/UK6821737896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76ff3d11099182c7513c7935998d37432a2af190113fadb37b6b9de3e1d93c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UK6821737911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5479552550eded12f4f6aed40001665bfbc056cdb7785d651ec479d113a3aa36. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UK6821737695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf54e0fdb68d353e3979b89e99197d1688a8c656b8f91ae30ad30dc9a162289. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK6821737882.
15 Lullabies for Getting Your Children to Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792ec64ab1d7c308eecc1c80b1faceea51b17e9c00a45a0b67d5553db119441c. 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/UK6821806047.
16 Instrumental Lullabies for Children of All Ages
11 Children's Nursery Rhymes for Deeper Sleep & Relaxation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b53a0f48162e9d73ff70f55bfc6e183e32e7ae7932bee81783099b3e25d68. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKN6K1903008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e16a463336f696adeed6a19791a069106f66140cf12c0c1067c615561bacbd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K1903007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620700a26129e11148119e6afab14cf2e7734959648c8a5775c28cc6ab44575. 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/UKN6K1902973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523eb1fda5dae1b7d2b426821a706d78ab7b31eb8ec9b0df5610df413ba050c3. 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/UKN6K1903005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca9ffcfb0bc240e5c7b30131b9967d268742c09ab8c222d1c7d6921c14af419. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/UKN6K1903061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9e513751afcfa028dc88ee9bc7446b2b97e8f8689a3b47cb403b3876eac69. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/UKN6K1903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e930679a8afe5fa0ff11cf4daa6b8e1ea1fd9e79458930e4b5404f07ea41533. 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/UKN6K1903009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a7a285866b16aa63855a34c4dec9c87a42ee5326f0af3b9a6829a48e8b58ec. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UKN6K1903062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ffb9325c122f30d6b4df473633e6823dbbb434fbd2ecfb3213605d61e3150. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/UKN6K1903003.