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 0x8217ffa8b6c679cbdd7cf0234a0d86bc18af1b9f59fc0c4a6218172a51b7574a. 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/4f9c20a6-bc0e-4844-8220-21d8c06a24f2.json and https://artists.proofprofile.net/proofs/artist/4f9c20a6-bc0e-4844-8220-21d8c06a24f2.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 0x5e2b8030b028c4484fefa01dc657350d1281ba6b54df82bed47fd76414070eef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES64E2303836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e52bb3400853390a1e058b6a0b965cc8ebc3a540aa99e5fc2142dbf1aa9cfb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES64E2451698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2249f654eb3aa9f11107db60d37692c6e1ba1d074d4d9b41011e30a67c1442. 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/ES71G2312827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b720e406306672361098a3e31f28f802fc142950e30b4d3b741e495b688c2c. 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/ES64E2343620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b8030b028c4484fefa01dc657350d1281ba6b54df82bed47fd76414070eef. 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/ES64E2303836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5105d019ae65c523dab29d39c70852db7f027f017e85c1a72bca870192fca4. 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/ES64E2343622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ef0acc2827483fd4436e157dd7c8823b2c1cfe2be3f5784e19da2d50bce267. 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/ES75E2203295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8d867da5b03fb4fe2838f1e477dd10e352c3902e57ae0fc161b36bb950637. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES75E2100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4ea918d087d32a8b16e8c2abc73c7c8cc24e6bccc6082fe712887ae85282e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES75E2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7401c62e2011a2fbcfdad0f552ff1ed299595d0c67f8569c27764da3092fd4f. 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/ES75E2201492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eed2165b2b303aab9121b09c9ec0afcbec2b955eb9b1426c7d04c0b4bf714e. 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/ES47E2005527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9810fc24b23264ea6861666ab486a52d8f49412e755d4ffc0d74b95fa5b186be. 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/ES75E2101150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73c1f49b36d9d40c8697e9f90c24bed162f7f88e9d8d71a284f69d10936fa75. 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/ES47E2008982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466eceb498c6cb75e9394495f77f29899a2bddaec23de4b7e4c61bcb397caf4e. 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/ES47E2007160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8737e462e282413887731f6cd20e01f59481bc388f03293041de48b68967b749. 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/ES75E2203297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b43804aaa17299e6682ecd25744bcac4e6ac2ab056cc18453c88b39e6cd8cd. 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/USA2P2458696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7c5f6a8331e9dfee6e7e2fa23ded09115b3b5390e543f8d2fb2a4de970504e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2458697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b301751adba1381d5bbab11bebe3fa6f9d3ab88d0726eae5dbae51a748f6077. 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/USA2P2440905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696018642713ae6787f0aa7aaf35e1c6f9d86102a09d86c16dd3c2c157f80e26. 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/ES88E2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66d6155aed6e1fb5a0c4ee306e187e1f19271378a387b778410352b857359ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2430259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c3f6bb30b9b020de47c397fcba4da5df2d2a62f168ac213b6fb29d6aaa52a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES6702403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0a2ab9a3122e4f5cb105b13e8de8068cd5693f4edea12e5fb48fc401e1233e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6702403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66511ef8e2258ff80911cf5ef705b3b985b27d5a1cafd44ba16290917be28ad5. 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/QZNJV2482593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeab9c9b0ab9e04d5d506cc2c6c7f058b47f032f056edcd1310fad3d1fd3f00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2460780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb7af4b2d6ba86c479ad07bced759137a30321c726a756d2f619140fbb3e804. 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/ES64E2465880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d860de23092f33cb6efa677727c061043b316267b00f7d38ede295f1b1646d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES64E2335951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285fd466b33da2ea1acf79697db71c753be0346510a28605a802869e341d27e7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES64E2325847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7aff4880d514521eb98024f12f5ec65970356ea0432665a5a77cfc2e5a5ef0. 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/ES75E2306913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ead0c31b282da617c1064574c9df0ade72a99611d7cb050e56dc036f2f099. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES64E2331657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5698a2f0f8f8798d21eb80147f0419858ae4e08f9bcdb7e40027b7c9f37e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES64E2327148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8052ce34e2f6c7515dc4d2d618407fc8abda045c58eda12a29128c38a2df5e7b. 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/ES75E2305157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda48e2db0ed47244f5883cd42ef88a46627c9857a853a2a8c5597a332f8b1de2. 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/ES75E2304038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0870a449835e21e7061a7147c63c8994618aff648e5e982f795fe496e07714. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f2e0bbce4db9d634ce2bb48f13f57285383eaeaf36ab4cf9fea3fbf25f9142. 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/QM6N22332031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c102e83dc7454f35924bea27b854b3e8da39827aa066118ade7a6bd397e282f. 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/ES75E2205324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df66ab86116ce700ef9606bc87b6594eb5b1ea47b3e7da05e19b5bd79f935b8. 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/GBLPF6717526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d2edbe3dcdfdaec80577452aa3df5c5015bc03cf7fc4924d0d745552650667. 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/QM7282077162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56782bc6cd6e94e39982148c262ae27868340c9166e6b51df2fbc73ed188e04. 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/QZNJX2205606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d879e844423fa3fe34ada57596f7ae111e3b2a7fb731dce086b399c03c9946d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2364179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d03d52aa3a0e205310a64030ce6168186aa43ac9777b34a21b3c41bf515810. 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/QZTVM2364180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc185861c99c872109cfa2f8a42439a109ab227217ca72b7f396cb5083d8431ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2364181.