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 0xfc8c60fb5c322e96eeab6698affcb25aa813e5d971865b34f0b340ba1864d754. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d71d0a43-2eae-4f00-a676-d1db32e4d6eb.json and https://artists.proofprofile.net/proofs/artist/d71d0a43-2eae-4f00-a676-d1db32e4d6eb.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 0x5ef3e4de469763477b3d29818648076a9611030efa36ef1b36c5cc2a6702d31e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2155778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0c4ec131c66d737ff51a5a4c3fd6d17549bb0adb0b06851ab432789382bab6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2406293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8dd730f3fa92e008077f43de5ab781ed17b1872e0ecdfecfbce0c3ff106187. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2334113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4bc2283940004a3228b497a2b70e9ca6c80d655d5b73930d545f300b5c3c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2400912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9ba41c3769aa7f2f6054e7fcebff279d930f2cca2e1a17a1cb12ba1b070a66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2404091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986da6573ebf277d36ddbf29f86281a2d278907b70eafb0dc6c9583a0b36e3fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2329827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758353ee520e14bb3bbb3b905a4df256331b0a6ed68abab45b2e40d44db29c72. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2406298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da7449db9964551cfbaf9bc09ae420821874bd55c2e9d285e10ea8214ebaa4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2406299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec307fa9fbc733b9cbecbdba5bd7c416b855cbdd678c97c8eadd0de68e6e63e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2406300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e341206575420042ed5dc6a2d2c437cfa9c14c9ca3af9d3074dc123bc80afb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9ba41c3769aa7f2f6054e7fcebff279d930f2cca2e1a17a1cb12ba1b070a66. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2404091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4bc2283940004a3228b497a2b70e9ca6c80d655d5b73930d545f300b5c3c0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ES71G2400912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8dd730f3fa92e008077f43de5ab781ed17b1872e0ecdfecfbce0c3ff106187. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2334113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986da6573ebf277d36ddbf29f86281a2d278907b70eafb0dc6c9583a0b36e3fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2329827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe21812959b4d392eba44c45e5a36e5fd0c67c64669046638b31e9673843400. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2319152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f7838383315204d472c898bcb0dc4124ccfd85c0a9a37d467cf9e7d1dcfdc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2309790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb80e7d3ba00cbd3e9948df7424d5b6d6cc29f046a10cd2d8288ba772c3ea819. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2248259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2359ac87d86c8530a576a0501178a05acd55109c81d5cf2801db463c45dc90f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2231174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b9b53ade69d32acda3b82f0e76fd0bbed6dcb228282e0c275247d81a914ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2223122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa64e938ce6a655debccc477a82b9557bca50e8fa6c2b50b77100bb7ad2a16e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2206896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ab13702dd864d76bcf9686b6ced4785dfecaa52f0840493e53742c472d7e8. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:03:41Z), 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/ES71G2136818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782bfd651dca77b0300b021b238af33922b12c79710a836dceb1e71b91d61eb6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2206898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef3e4de469763477b3d29818648076a9611030efa36ef1b36c5cc2a6702d31e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2155778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef860b30a619285a2bd3d175f6fdc952d10783de6c9b454152dc14c2b5007b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2144223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef860b30a619285a2bd3d175f6fdc952d10783de6c9b454152dc14c2b5007b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2144223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ab13702dd864d76bcf9686b6ced4785dfecaa52f0840493e53742c472d7e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2136818.