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 0xc28c69dfcd7a478816163f3b3f945a7bec68fa5243d8d9ed0f9f389e1b4c2699. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c179c22-544e-4938-a5e5-0b5b4e026613.json and https://artists.proofprofile.net/proofs/artist/1c179c22-544e-4938-a5e5-0b5b4e026613.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 0x3a85702ac6f5e2fe3e20165d469b71bb05323269d6a9c09de08c85117f176674. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZFZ32593209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d60f3002777b1c6d65cda91fd8745ff5f8d78e848b91ad391279e4d43fb67c5. 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/QZFZ72544339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af85d6f7f0a2e8d9aa0224eb81f0e03f9639fac7761f8346a7fe03e1c2a7b4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFZ72546398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18beaef8cec6490482eb2f0938f8ecf416276db87baea059714683e01e3df5b2. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFZ72573374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfa5fcbedf07e66a3e115c0c0d85cfe72015f7be923a7139cf9ac2cfb5b8fa9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAHQJ2557518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f654b71871ca5b51e95474b953c3553c2e035b67fb3a554382d82935a396854. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CAHQJ2581946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de043233cbe267dcaee7a4cabddb8e1759b52d1059eb776b77e71a8136c2625. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES72582329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66e0e68131757ba874562a597df982c8428aa8a76a0defec18aad6f3cf73aca. 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/CACWV2505330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16816a930f8bbbe2dbb10ca72d904019c687ac114db9070295d96418884ee8a4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CACWV2505306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5399f9c7fcca0e49b301ca22c2c95752bb5af17dd92b42ffc1ce22fe85e3a. 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/QZES92552300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f437c4c3c49fa86f730dd7ec9b5db8a8008e719c2ee90457f3fe222ec7a4ce. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CACWV2515966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708603793b317f74ae3990e5990cc95878c7c51b1b68d9d8a47f0a15a10d08f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN72512403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d2f488b109b5399977363c07817f677f2cd83f68244726ac8d4deb5a59468. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CACWV2531329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7112e451f4012f06ff4c409b082ee81cda91914313b24a05991ed84f58647. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CACWV2534622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d682153d04add95417fe139ba77c08dd93cf77a9964b70f7666e4c5131391ee. 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/QZHN92540537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d94c9947a60c8f0da02c223160df0ef99d1002711efaac7eb05989cbe6709. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEN2534476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8942586781a3d7b4e7b3e5853a34bbde6dc3f2dbd97bf93cf128912ef89390b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CALVP2543135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d10ce4b8f3e7665e9787eedc5032a35c569f2b2cff3b689423c2d6f30339a7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFJ2511557.