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 0xd00f5fa547e198879bd90faeb055b2a13cfec9aeddeed99521c77c517022101b. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd5a808b-b3d8-4435-b7f4-3caefeedc8c1.json and https://artists.proofprofile.net/proofs/artist/dd5a808b-b3d8-4435-b7f4-3caefeedc8c1.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 0x954b96c1d2e282d741876cce73177454cc9d0cf5f7c604e3b756ebc633218688. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:06:31Z), 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/GBMA22340425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09d0ad5ec0fd1d3bde4db611b159077eac0874cfae41538ab0d494a6ee2f470. 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/GX3Q92431951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9273ab7fecebdb3206a3ea3271adf9b68cdad7c68736e45e1d599e9a8d6e3247. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX3Q92431948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4585cb4debeef0abdab84b4cfd4cff7c33d9e1c571bcaac973d3edcf13c841a1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX3Q92431952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402aba8067a71da6cd78bf37c88ac9955fc45483162d9c7fc747a196457e2aee. 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/GX3Q92431949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4503d25d359a577eee45f55df73118a82467968b7fa9217864596ca5d7a90cae. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:27Z), 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/GBMA22448939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ea72031ff45c07e9614c12a3808e599a2e916e9d2bd596f3a425df282ae13. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:31:25Z), 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/GBMA22448940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d1eefdfaf75997d9593a9891f4a5fc1a87c174d6e270c0b09eb13af31f585f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:39Z), 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/GBMA22448942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163f55c8edf8bf60f2d7e68b66d9a0ae686adccac273f09f73820afb7f86204e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GX53U2349867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c149a906fd95e3077b009e58193c3712f7542e9a714ba0b90bc00c344df621. 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/GXF9Q2487355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2d990fb987cb91fc78e7840cacad86cf53a10656671d68e5ba182c15eb2c2. 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/GXF9Q2487357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e69f9600c942daebe6bba6ebaac4424adfdb45607afac9c6d5a9923e8a5100. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:33:26Z), 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/GXF9Q2487360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b9b995f5051d7f2daa9d8cf1c2322902d25d084e44ea18c5f0392fbf511d0. 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/GX3Q92548250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a91ec9c34ec4d83ac9638758c1b803bf5a7808af5fa1c52accce61198b6688. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:00Z), 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/GX3Q92548252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db7076cbb1aa63bdaae1684b6b43bb16a39a3a0e97939a8e811087739b2bc7. 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/GX3Q92548251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57dd46ea1ee77c7edd05ae54f0299229b2229a6fcba93e8b5ce1169535f9a5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX3Q92548254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a24dc764d318af59c8d7cd4c1e0f1462599d6545347cb428d81c21539ef5392. 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/GX3Q92548253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950bb33ac8cc474a1d5fc63c198c15a20578d5c33abe1db8a487219a8426693a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92586021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c9ef5521e23777895bb924e908caa03ea27797c1fdfaf2c963c54bc8141b1. 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/GX3Q92586023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eea49e35ada0ecf2dd63551cb03174471fe95831edc564ffab5d9336444404. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:34Z), 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/GX3Q92586022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dee3178303f112bceba5e52f75a21448c8db0f5ea843e00d9496b35befb91bf. 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/GBLFP2597473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0b70e3b256258b05eeaa89bbe2738893bf8ae14f80a885328e928c67b8d41. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GX53U2585860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439acb85ca6bb9b4c715ee2fdfb01fcbea364b7fe66eeed23186232c21597b6e. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GX53U2585865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab89fea9b76f4d4b57301a3fc5ad0029ad084450eb12bc44762c8fac5b275df0. 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/GX53U2585859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd28ff81b54bacb818f137bfe67735747085a090b4f240726fd5b79f2ccad9cb. 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/GX53U2585861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe834bbc2f610b26e1d67c61d42bf79a2cf8060d5838cb701913f5ca7d3d372d2. 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/GX53U2585867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1014d87def126dca7a247309fe2d0bf89ca475649dad27c949a5145c8bf3a48. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXHUT2550168.