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 0xa101b3e594e515d3be5202ac378b41473b32f444ae4c85e1d537cef3817f94d9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97bf85d2-dfd6-4c6b-824e-c4b78063c42a.json and https://artists.proofprofile.net/proofs/artist/97bf85d2-dfd6-4c6b-824e-c4b78063c42a.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 0x65152acfaea52232574b03f4ae4984cf63baaee3e875363a7087dae0a0e49a4b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAET2022448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6db2dabba7f5bb863f5fa1e2d20103cb91fa1b2c45036a2a6860f95ad96089. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAET2022451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9adc4420f0fff5a41c479438fde57a104025beaf95b3e609cf5c450f2c535bb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAET2022454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be673cf4085b789590c2bad7d23d1a1ec06d7e1042dfc9fa4c92fcdd354979e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:52:56Z), 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/TCAET2022464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c0cc356053dd873dc32189988d40e648f2683ee719bff4f4ce9db12a873ff. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAET2022469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf253139ef1e4d0b5ef8aca120377ec5bfe6c47faf8b1019f8030c4e7bfe09a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAET2022348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587b4bad75729e8436bf40592b10e7fc51e7a1e10296b848f33100b2451d2bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAET2022350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da046a4e4ee53147ced2dd5cec7370aa97942e51e1df25aca3d339890f23a3b. 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/TCAET2022351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf116a148ddf48caa80b0342aeabc32b92c57864336e290ca2954b72fb39c8810. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAET2022353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007be5f89bff39c2c736ac8629e7090e1db3af1dbb633113347c58ed84d771c. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:04Z), 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/TCAET2022354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705935e969cc6f38266a2665429662ae7160ce5cfc320cbeb2e470a5f5fef5a7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAET2022358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a9aedee131aa61aeb9090b480880ea5f96e83801679a3b61dea95ca46ffdb2. 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/TCAET2022360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba07a8515539f03844a44719f15087311abf71503b63b5254b80744402bfecf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAET2022366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cf04cfb8121b457737e42a3e3355370433d6f73303fea004291d51b01efc1d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:58Z), 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/TCAET2022372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4963bd67b38505eac88af5d39778ca1879962eeb6b6f2b82dbeb5e96495b80. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAET2022374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be27edca59b4f4cd3af18a228f2bd8b6584cced19b5d29a52122803119d6b7. 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/TCAET2022376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289524abe40018ae03227b2eb2aaa858c1f89795a113e257b787bd150da7d9fc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT6622564593.