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 0x7b74d5b79866d6c8f89ddd5897507b3754d89cce4b8985bcc57e86c9f9440ce7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52bcf7a6-2514-499a-8d2e-242e8adaaffc.json and https://artists.proofprofile.net/proofs/artist/52bcf7a6-2514-499a-8d2e-242e8adaaffc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
True Nelly & Play Da Rapper - Mahanga Whare
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 0xd2695279a9a68185bfba2fa15d2798e176ef2e832f2b176eaced1adb80780001. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ1930544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ffac59980304c873a45689e26b4d0759f4f35b0fbcfcc6d7ab78b8c1b8b60. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22129576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c17475d47d0a055984f708959d84bbd720a27092f7873db3ad2e0ba95eeced. 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/QZFZ22129577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d702c6941e7aaff7f31f1b86702fc355dcf381cfe92e34c3a76984cf16f6063. 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/QZFZ22129581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226b8223df5833d1436bc2b760ed99f4a5737c9bb57bf2137f10be5e898e171. 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/QZFZ22129582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e3fc98506a65f668ef638966b6c5d5d23a3faebc94f8a3c9b0499c97e3497. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ22129583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd916947510f31e7b6e557cd13901134308f3b18d5655a29591ec52a86741c975. 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/QZFZ22129575.
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 0xc79e4db293c08e89b14899476701f6d7377bffd151b487f9af56506489826c5f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZFZ22129579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b849532a884bd93d8721143bd1bb50f7d3f0a02b48c09a10bad5b0aab0d782. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFZ22129584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096ce9dd34bbf025bc84aa38eb6b7919c0660823fbd092229da01185a36437e0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ22129585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba89af54ddcfaebfcb769b19997ca02167ab7b4e206068f8867e97ea8f019cbc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZFZ22129586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d3aea664fb51fa08a15373022601b9f5b4b716b5a15afa8feb93d86fdfed2. 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/QZDA82214098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c12b71144e8b643622de3701521835ab55ba645fb670ebc7d3820cfd43516ed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP42287790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd83e965f94da0fa5ef45de6fd40c872e8b75a3c396105e4cb4e1360d3149f4. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZRP42287797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce1a51047115342b7d929b5160cf183aeb14e4a3e93d3372e74df695484d60. 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/QZRP42287791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c224c0c167762a90ab29dee14a53301c972e66fdff16df7ed7a5c0b25818ac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP42287796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30664d56674ee4d58d0482be6d76844e54346b7a73f0238c4f27c1b9ec5d566f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42287801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c040576563800419332ec1022746afb0407cd4454d663ea1daf0315285b4f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42287805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40deb20140c8ae55182ba885e5467dc97afcb00bb9d62991fbf843a41ba527eb. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZK6H2345725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad877ab438b701b68bba2f81e64a74b6ae334306b443d4cf93b4a667a2db97. 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/QZNWU2326418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b449c4b4e5468be81081cc73f04270b7ede0a54743fde3823dc8bf872025564. 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/QZFYX2076779.