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 0x3fda37288b549a272bb85050759426fe479ce57363af65a6a2866007b9dc42b5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40ee6617-acf1-4cdd-a97e-b14123316106.json and https://artists.proofprofile.net/proofs/artist/40ee6617-acf1-4cdd-a97e-b14123316106.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 0x042de1c0dc933b58571298ba00e8f91bb296821c8e4429ffacb9687fdc3ae985. 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/GXHAF2536027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e83bddf1e2ee5e78b6c925557e299f606041462976770e8bc6eee210ac4399. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:03Z), 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/QZK6G2091374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35717449c458070ae24c4047ab3af2aed13f05fd60ca9504ec5044cd55615d07. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWT2009729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ac2c3cbeb3304b420e2dcf28f056ae239ed0631bc595ecdea042801155f74. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZFYY2108249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171169c9429ed895e238ce446c72423abaaa7c073c9db2ba04b67ba63d3f42f. 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/QZK6N2250644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca76161b33e316e9d81e046550ee173c4b2420e11293411d0858630ebe9230. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWX2276948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb088bd94f343b5b3b2b70a7909de8d19a4474c0e4819157d99dc7a1683baef41. 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/DEVE12400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cebede541ec1128faf94d46ef878041fedabb4bc3cdf3f696d9b0cde87ac96. 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/DEVE12400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe77615298a70b6120c03884e379c8b17b3c3acfe0b0ad2a7abbcd99698a0294. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBMA22478827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a058c94864a9256c6e8ab668cc9ff870e3c59b44a875a7e38b496ab365219d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:56Z), 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/GX53U2346885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e94cb647f549cf915b51644d1f2ec247c3bbda04c8dc6c6c4caf33f94f5494c. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GXF9Q2406996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f091064730ebe61003922f298cf5c34517dc30a68aaff01becf9c955d29cf69. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:34:59Z), 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/GX53U2553240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42419bd6facc7c3b9c6c0397a0f72589c5e9e4225751de9ecd61810e801c250. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GXHAF2563148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec47294842f37ca8685fc0d69cfec0bf615c7bb5d6b75a1ee548b8fa6b7d5d6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:52Z), 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/GXHAF2563149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713fae9e4af6ad5f84aaebfb73cfb877ebe2a3684101d7932f753d4feff4cf91. 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/GX53U2616351.