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 0x7252e0c78e41a9dc9cb863baa1e49cb756f0115a4aabb3399c115c659ba4b1ad. 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/f27c99ee-65fa-4064-bc81-78537a04c0ca.json and https://artists.proofprofile.net/proofs/artist/f27c99ee-65fa-4064-bc81-78537a04c0ca.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 0x8af5fa12fc287b8fd294c168508d26292c05124ad58d7bec2d6306fc79758bea. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKP3G2001822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2022878f4bb5f9f2a28c77a4f7335292ff17647db8f04abc7f6787f559d885cd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UKP3G2001837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6469b44580af385bdcef7cb4757a39254ef848070c5bc6fadf876dc6da044011. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/UKP3G2001838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23070985fc2c0e0a731a5863404bed0ad1fef2ba39c9206d6bdc0c432298fc12. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKP3G2001816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65978e6f039009abcb8f9b663941d1c1dc19a398a1fb5e4f3f5e9b1fdcaf1baf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKP3G2001840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f0cb6f3b10ba53415109055639b938a1388fe9409669da27e65e29ddf513b0. 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/UKP3G2001813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb4505cd62b9fa7096faf80fc02864742daeb9255efea4bfb4d6e72339b2f6a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/UKP3G2001817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca2f6ab4451ebb82f6054dbdf12ca6073d8fb306f36e7e11817dab3f185a105. 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/UKP3G2001868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b7adbc25daf5d9a0bfa7dbf7a241de11ab46f05869fde9b4254a305789aed0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKP3G2001828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29e0cc7a37842355caa3077742fd5cb624ac65e98171340cd3c58e0d3f6ec3a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/UKP3G2001866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f16a0a2dd4dbfa681dc6f9c6f402c53d12e6af2f4cf5d81cebfe91e8809cbf. 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/UKP3G2001832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a13b72381f7a1110eec907398f80fabb234d8ec510dd81cf96475a10265b1f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UKP3G2001850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e0a7ccbd8be8c5c50f555a3f37485e5f4c62d78cee614b208396a1ed9efc9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/UKP3G2001852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d00daf7a8597fd50c1474357b9c7262d5b1fffaec75e26b39b6bd05be4aad0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/UKP3G2001844.
Let's Build a Snowman and more Christmas Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a309ac0f62cca3500a1949e97f8abc8944feef421358fa932f291de71e90e39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKP3G2001854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217a4a0f68c71e05d9e9084a300789141264128bb740337a784d8a0d6ad9e5d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKP3G2009666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217a4a0f68c71e05d9e9084a300789141264128bb740337a784d8a0d6ad9e5d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKP3G2009666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da4bba505bf45cba85cf050ee6d7f891ae1ce01950abbb8a55777e6fe35d1c9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/UKP3G2001825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0239246a42ff5c3de43344d6f45144f07da6fa021ea8c054dc84e2ba00e64e8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKP3G2302067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acd8072d258fdafed38c1839d4c5ecaf1e97dcad8b73156862dfc6495246e7b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/UKP3G2009670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe68ee24eee7e804ac7a90647e48b9c324677665ced6a85294e3815a644c9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/UKP3G2001831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acd8072d258fdafed38c1839d4c5ecaf1e97dcad8b73156862dfc6495246e7b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UKP3G2009670.
Nursery Rhyme Singalong for Toddlers, Vol. 2
Christmas Singalong for Toddlers, Vol. 2