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 0x8c9ae964cb8fea1e66dea9c5c2f06b2f9d612dfb9ec76537d8a4c038e8c7c56f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/416e1b9a-395b-4f7a-b9ef-7502cb23c6b5.json and https://artists.proofprofile.net/proofs/artist/416e1b9a-395b-4f7a-b9ef-7502cb23c6b5.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 0x91e6a8bfabdb937d59efdb9cba508be6325314710fdef0ee773971aadbc9f9cd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2461685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90847a2f504cc4e772625b2ccb23b328edd48400d04f1cd84cac24af93ebc72. 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/QZ2J21506024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8d0c87c0bd3202c5034d8b1ae6cac48d594a2741eedee37502c41a5843186. 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/QZGLM2353220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ccbdc2c2d8a5ddb433551b5dd6019638961f1dba93fa0bd42fdaa4c5c2b433. 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/QMFMG2330443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe7eb2a4190dca29a475c5b5857c0ff06a07b17aa9e53a0fe7aa3e9e282d0b. 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/QMFMG2330442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e055b674e97d478fd0dcb7520bd38fcecd6b757bcc7debb06880aee187f3c. 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/QZW9M2250387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c75e5046a633d5eed1ee86fad226d08aee10e6e00f4bf1366f354cf08fba86d. 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/QZMZ92190178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891f75f6e108f5ff2a28cbf9a77a323d34864d97966929ef153d35a7af1a8d6. 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/QZNJY2123262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891f75f6e108f5ff2a28cbf9a77a323d34864d97966929ef153d35a7af1a8d6. 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/QZNJY2123262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf199c2dc80b81718338ef741145d00372eab3b8d091654c346b8efc7d7505675. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARNFK2037828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53dac1cdc0e2faeddec48cee4aaba4513e9278396cd44e13efde75b9db84340. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFME2127152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe0716c84a5385e0376943393d0348577472d60c2bde0d4acd0b68344eeff0f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2127161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcbd3951d6056ee2e8ba5ef9d8f614899453f72e0ad42498bbba9b30616503b. 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/QMFME2127162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35d54cdc1d915a028ac4af17722967e122317241056853108eb19fbb9c82b04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2127163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b33d31d4526cec7d5ce34ab00ea9bbac0836c2ccab595bcf899bec5784386f. 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/ARNFK2094579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0fa16f65d3d6bc6e45b86f3effba59649c0ac00cbb60cd41d22457dab272d. 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/ARNFK2056877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d02f649c8dcb696b54d8c005bc3af05c3a11aeb030dce749288cddb94b79e2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2127164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e18bd9fd025cca7a632ba1942a50b38a99ea0d25eac6d68ce0b8d5a7b7be046. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USL4Q2415660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7e97c5658fe812b7fa3c55f3270e63b4e2f1bb04b0b1327bc3b27e856c4ef. 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/US7VG2327399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966b38d53b02b072bc20e6eb99f21a25e406ab23ab46e0e89976f3dcd4a7299. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDD2296375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0fa16f65d3d6bc6e45b86f3effba59649c0ac00cbb60cd41d22457dab272d. 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/ARNFK2056877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caed1d83fc4b91a3affa31f68262455a9e66340ad856ab9cf5f92d986b4ab69. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARUH42400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ce2860f127e71638c71185efadde9b179e78e2aeb9a08ce6a123c359f68413. 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/ARUH42400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef88d2c22e7aab229cf03806565348ad7204862a27f871e42510af09da71e49. 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/ARUH42400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad1bcd2fd8e221f7066718cb3a76e67e2e71caf0e3c4f07dae35ad477273a67. 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/ARUH42400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0c6b81e5865f52a26a26503c911afe533d9faae455920719fb4533dce64389. 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/ARUH42400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ce75afc614de1f0b144396e2fcf34fce2718087f93c460401d48c1b97d6a9. 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/ES75E2503783.