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 0xb1f01c21009fe8e39011287177e3643e5d223069c329c5345417e17c857adcce. 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/bceaac30-0d5a-4db4-9615-3cca0a9b0ae5.json and https://artists.proofprofile.net/proofs/artist/bceaac30-0d5a-4db4-9615-3cca0a9b0ae5.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 0xd5d4a415fceaba2430f34dd8032d9264af407a916a2db0bce79a6c4b2b39dfb6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGA2266981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a7b4558447a8850f556674e6f6830218ea3266eb2d32fbb9674fbe74e3000d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:18:37Z), 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/QZMEM2276768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb11b38ad6ee8d195e65c3c59d52caf58eff2e97a896bb69f249e7e0d9bb276. 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/QZHN62244384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a9f4d711e5c887a0eb601900a05ed03f2f44607cb2dc96d154177b7f1d227d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:01:51Z), 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/QZMEM2276770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3963746eba0543d9bb1fae21d3965f45db7187f8079d97af1c14e3761fca3221. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAGC2284240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473be3f43026d5cde4575ddcf0c1bcb30100812426dac94b1cdc43a7e78890ba. 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/QZMEM2276771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3145c784aa0f32536e8d697fa2c853b5a14b19e0b0c476a3b4293cf42e8835. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ22384825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01555cea2ace19039b1e8d09e8f1d37303c1cb8b0241d31649bfc17a3e03ef7e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:19Z), 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/QZHN82383057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016e908fdfa77e97776be88cf7387f985f5f77a151bc3bbba0e60860721d814. 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/QZNWS2330227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fc186afaceeabd0b9cb4103c95e4777eb7e73d36322f2c88bdaa9835072c72. 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/QZTB42369483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e3bb6d7e1c361d30696447c899b19fcb2a9f893acdf77e974e04de5c24434. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFP2320676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a619a84b608359a43b17661758b2b52e46ceb26610292a0a1bf1ca75393f48b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:14Z), 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/QZDA62457226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82f691676c7f82d1b52b298eb3cedfc5ceb63853d4b97bf6a24b4f62994496. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:04:25Z), 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/QZK6M2495904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e3bb6d7e1c361d30696447c899b19fcb2a9f893acdf77e974e04de5c24434. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:33Z), 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/QZWFP2320676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016e908fdfa77e97776be88cf7387f985f5f77a151bc3bbba0e60860721d814. 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/QZNWS2330227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf7d2a1c93caf3b40ce3d228eceeaf278d42e768c6ade9b400f9addfcc79f5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMEQ2538412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed671d71896f2743e97ab84784f032ac78b4af67cb722ccabb1c852cf14ed30c. 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/QZZ7L2505675.