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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807786410f0a895a8a298b973143a2ffe5172c370645b1af671129ec83f5115e. 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/1fa145cd-9613-47b1-9722-143d9abff66d.json and https://artists.proofprofile.net/proofs/artist/1fa145cd-9613-47b1-9722-143d9abff66d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2eaa220019342ab67fe6938f6342c6354b6d6721607ba9b4fa93be3b958249. 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/GBKQU2014759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f686bc9cb828805716e6c26dca41a787f103df90747a329740c8c1bc4d632. 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/GBKQU2014760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3001389665d3b336c9d44fbcfdc228a930703e206f97d54d1d78f954088116. 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/GBKQU2014762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac01e2cfeef4bb04ca212906700436159fe21dc2289021dbbc17f03e1b65753. 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/GBKQU2014770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7580ce1cf726bc321f4b705130c310943bb7ae85fab07e5e31a2d1e8168fe3ac. 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/GBKQU1784055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c097bc590c1a79127619df9747e318c65214e20a088d05128ab7a928c4ff385. 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/GBKQU1784057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b4a2ae117b0b75cce542654dfc6b17d60158eb6c557b5fff5aa5865fe897e9. 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/GBKQU1784059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb9a877f4b263994ac42671dbbdc8f138b57d5067cd20b7adcd40ed2f55815. 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/GBKQU1784060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a7064632e679f9eeaa88cdbf753b2c8bea74ba5543ec811eb553e9cb69a65. 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/GBKQU1784061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a162f309b4103361f4642f2a9e4e134bb8f3aa498c6d60ae2b10dfc9ffcea3. 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/GBKQU1564669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157258d99e450e4d2ddbbc0f15964bd3aabe0097b6ab44d576dddabf142158a9. 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/GBKQU1564670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61a0a3fb320190dc10242bbedcd81fc802ebb55f62b6c890a653e90b6b6fb22. 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/GBKQU1564676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2b97c98cd626d622a5b8a587d6b0fc65db079bf4e832ff2b98766da98dca7a. 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/GBKQU1564681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d2eee4bc202a8380f5ae098bdd92db29322b02d4be325fcb76d3db33ca7b1. 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/GBKQU1564688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8275d2e99fdad3ad37abc62e31cf9ae092d0f50bb528a93a4e330f8560cd05. 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/GBKQU1363433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce9bddd29e50c6f8ea924bd444458e7d25b08d531123e4138e4b5de390f457. 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/GBKQU1363434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83bd6c3271e6c66ba37af687330f1fff058aa6fb0bd6cd64053aa00f00790a. 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/GBKQU1363435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ddc5f4f4b4f09541e453658f1427073f8d43db22274d23f8e96ad6dab6237. 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/GBKQU1363436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d4abaec170630abe65bb0a45b7bc619ae18055a6bf65cbb7b9e74f753b3642. 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/GBKQU1363437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee19ebe2f6b14362a4e84dd3ddc53ec52da4ca2624b12f5453f7efdbcce6ad3. 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/GBKQU1363438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe327a94a57fe54dafbf9875c80a68ab8531df9b24d1a16fe565d7d008ae54. 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/GBKQU1363439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c9cc058e13d9f059ddc9ce23e7deed44e05075cdb30ed21acea59ade3bc4f2. 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/FR2X42460839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599b176090bbb3deae8ca6b658f3c33fe77b7c07aef00d96b5be48c8e5cfb94. 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/FR2X42460841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bade6a1211b20c33ac40cab6aae38c6d76ea374bdef60f0c62d866526a55a51. 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/GBKQU2503714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba76177e91fb6d385fd782e4fbbc9277fa103ec230905dc8bdd9a703d1daaf. 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/GBKQU2509766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd8de79bcda40ce88ed46921075111a0f7a16a79ac1b98a3b589a921a9b7a64. 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/USCGH2509429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe2b5b429be6f3999b99d527d9a47ef23b405eeb2e6f5743918fbb13cf49bd6. 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/GBKQU1564697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f597f25500d648e96a9996129edd737fab8beafa8f6291851769bc1f562757. 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/GBKQU1564700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb67bf26560d9b8e9e9c0c1dc4b4c0e8e8f81139985d68ae46e11ebc026db1b. 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/GBKQU1564709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636ab65c13b3f20594a250017c727fa1bce114468f2e33e734c0691583a398dc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU1772493.