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 0xfbafe5e80459c80577e9f3de5d9c1149df3d6dc3946ca3ae1e5f26002a05d886. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3152d03-5e6c-4e18-b937-a17b037eeed6.json and https://artists.proofprofile.net/proofs/artist/c3152d03-5e6c-4e18-b937-a17b037eeed6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd137f9c5136e8e3f488d8cda6f99c70cf42833da9b18b643186dcd89255a66b7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNMW2101884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3ae8bc03df9c56801e49bf66f20c57794e086d6d42b031014cb4e670bc20ec. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:22:35Z), 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/QZNMW2157834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a01bb25c3de9fbebb2b0bda45443c405f65412a55051baae3dc82f2d9f2632. 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/QZMWW2279501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b02a1f8affbb68bf21c37c4d397e9eb89a062f8c9dee34a6a07ca1975025ae. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNMY2290731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787e686cbec492de73ad056b46d9ea87ce27661b4cecd288c9e76a2b7323f077. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:43:04Z), 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/QZNMY2290736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f515fcd1a8f9c2089b6c944c0411252ee06893a96dcbb96689ef51878fca2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMW2388731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f34962844bd505c17a5459904aaaedb32c9c800256bf82270e6e32586a266a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEV2430049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639b713c440bcc747560f30c3ef119704ed730a98361ae8d170184ad1460146. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMW2451039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f422bfd71db0dd53d627a0f63d991b43bed1a5658d07e29c7967e26a7a6360. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZJG52576190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2ccc907424bca1fd61fef512ca8ab21a928ac9b28f50518d0861ee9513c800. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZL382568607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192a3df662687f2ac8be8909bee4665b3e13c36daa84f8ecf815aa32d2367621. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZL382568608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81ea9d9feacb274f73190e70961a6debd93a31ebcd5f6fb36b21362efa886cb. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:40:37Z), 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/QZLL92509167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527bfc2020019ebde8200141fc4c1e877732081afa723221e4805b8bf7774fe1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZLL92548713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c43b6b8ff0e4a9985c44de962713078d396b196da6230b954d5a89a6ae639. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEV2545571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaff067e02b576e16f22dad4648c7bb9dc6e5db63cd01dda9544092382f6728. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEV2545572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1942e88d4f10285b2ab7a5ba6f9e4cf5afa83c301d1d18921d70882e6d2cc2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:21Z), 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/QZNB82553098.