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 0x479ddfc9a8493ed8776cd052d23ec8367698cb729bb28f0998900b8da93bcc4e. 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/2c18f3c9-96b1-4825-ae1a-35d923fd7f25.json and https://artists.proofprofile.net/proofs/artist/2c18f3c9-96b1-4825-ae1a-35d923fd7f25.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 0x48739b699f8ab359631943aa367357cfb17d72ef7630ebab739616fb02f51074. 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/HKG732297809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19932af30a3c764f2f29b07f8c9d76b4f77ebf8186861f865f65f530f3ba468. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA0R2301492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803829e7c7a1a656c134d6195ac7bcbf338b7bcfd88d312c3f07ca64210966c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0R2301489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3256aa282325446eeea9789508caeed3c3fb44c0dd5bbb4d5a0f8a2113f77530. 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/HKD012482077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d56b43b21e4d52d13f8d189cb4d568b9324bba0e4e712c28f07625b3af0fec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA0R2301482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531e5557ad58844677aeda3a5bcfdf692238d8170e4972928ba7e73d19950fa. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA072373676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc8478ea1f0572ff3664c99d4c381c40183a527bc72667cb6674825f6609b88. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWDL72201380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320829646038911ef23a061b3683a7755463bae0109611050f3b8ce22639d0a2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TWDL72201396.
全世界都是屬於我的海域（雙魚座之歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9fe8b069bf70aab6b27b6a44fe50db76218465b01a81feb1655971f3d01a44. 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/TWDL72201406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26278401498f043dd283081cbe8274e9fee878beb10e3d323ef21d503897c8e8. 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/TWDL72201388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189c9e1234bfff3d8f9620d5c1615bfc50066c6e59f2fd75487cbe4e7421556. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TWDL72304468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbad3d9673fb5573e7f82424bd6b4f7cbafc5202409d18694593e3044a97cd3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWDL72304477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e538e939e9ffbc8d3ab435ca2bb2ac025000a74594dd9a44183e5f854d76ab0. 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/TWDL72304471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d35dbd8f2a7295c5c16e819ae77263ff5365cd212e94e6f2a86897829847e63. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DGA0R2314193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a86120d59948f530232d098918caab56183a184d94883b3e52893f7375dcd75. 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/HKG731591791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0c82b6f9b66085e977499666003a2a66294308da5cee42b0d6991cc95f3a5e. 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/TWDL72307072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69314b034d83f71381a3b55ecee9073a9b7899a267bdd8d81ec1777e61ca9a5f. 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/DGA0R2314195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fb64ea303c105e9ce7bf28809b27a28b82274d290dada3a4f9bb1f0da25cd6. 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/DGA0R2315193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9b80d379a4b90d42ec62b7341ea5ae3b10fc9126c2c3833fbf384672b1804a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR96X2447389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6859d5d799f6d75de2e03fea3a5f5530bdb91ea27c51027b3d8b716c1fff579. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX872425100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543837ce08b579e6d9a07a87d96b84ad614500a2862d2d10d03863f1e54537b3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DGA052435208.