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 0x79896c6a6afe63efb6856e30d65d0fb266790fe174e51b3b1f53f33dd27d8f56. 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/91dbfd8e-d97d-4e69-a463-1c9bfe19d673.json and https://artists.proofprofile.net/proofs/artist/91dbfd8e-d97d-4e69-a463-1c9bfe19d673.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 0x12540c380dcce5d00f41d3cf45ea588a6f9d747996a954af16ae2644b31850d8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:11Z), 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/GX3HH2458044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc51a25e9b4f961a2c32cca83940d7db37d4b37c5db1ff0c65d8a7891a07ea8e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:24Z), 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/GX3HH2402572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c628cbb7cc239595e9713d2ccd904b06a8f212a3475cd1462f65be89e94d964. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXBDS2415434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560b78f3707e83b47bcd3ea2a0c51d9d285f34e54c4b37e653b0334654d8495d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GXBDS2491088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41717619f3aa8829f0dbc80406d3521d5aaffd042497f4200455389b4a78fdba. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GX5MY2491665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d06d8046ce22b5aed4b06241359c12fad1f7c5af5a0c44466abf609582acb1. 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/GXBDT2443444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2882a3b61a9bf1c1adf3b1c2d9dbb37a71eef79be93a276991f0d833f9096a0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:51:42Z), 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/GXF972427156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adaee9338f6739c297722d8aa1c4f594cd52e635ece6db2ab232a30b21304f5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:42:34Z), 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/GX89G2522271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789af83aa90d062a4809443f8072ef6f20634229ec05b058362e9461456db371. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:29Z), 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/GX8KD2556883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5faceed8b86bbe1bd3d3f2be590587f8bb94a07b958a519b64c36b5d63d97e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX8KD2591065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74adb92d975ddebc1dc2a99ff7fec7f23b9f10d7ab8904eccd8bad51a333f0fd. 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/GX8KD2569748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34edb083a607e2ff3e800b1fc252f0514d0dedfaac0aad6624cad099c34970d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXD7V2549499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b65270922aec908f996026dc65b413af6737080bef6f7f5ac4e71cab95a03a9. 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/GXD7V2595841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b9354e4c8b9d383c2724f1a6a67b6c5abc49ecbcf5967760399a73e716f476. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GXD7V2566783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84d09df773a38032cca737aba3f8e36d562dc848a657a8a007079af7470ad6. 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/GXD7G2527288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995c5ac9e396859e8caa76cf1cbad42e7e460af9d41f234d3d1d8f7efc1eebb. 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/SGW502578799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cecf3cc261d5d901559f10d67e92dac8b597f2ca08a7b42353f1a72b5f9eab6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:46Z), 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/QT5M52504560.