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 0x326db800eb46fc6b00ecd295f22ba80d9d805ec5f56d8735acc5241260b3cb62. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7e1f501-a87b-47e1-900d-112afc1f2d3b.json and https://artists.proofprofile.net/proofs/artist/a7e1f501-a87b-47e1-900d-112afc1f2d3b.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 0x2613b722d68d80b388471540906322341c841e199c42711679549869e703f8b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USYBL2201998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f86fd9f36ec81f11752f2015623dd8d9a6d1f4bd84d152769a3ec94c5a22bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USYBL2202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf31ef7457d7373813e5bbcb095dce963cc47b9d4dbd86c8635989e3743c830. 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/USYBL2401623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3d94d70a59d1a5af6cd1c39d454117b96220b68ae300c8ed41115b1ba4eee. 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/USYBL2401624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9e17702b2661e791d3c01afea702f36189307f1a54fefec851c51de251e8a. 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/USYBL2401625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975555c8c8b787921918fc37c804d2960a21ab663450225976f845885ace5fa. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:46Z), 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/USYBL2401626.
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 0x69998e25fc671221e254cd98a4fcdb1f7a4128b297e4d0d3330f7aa4d202439d. 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/USYBL2200788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d611fbfe787ddae02b05db4c4386d1cf6b7903b881ae32128108f61c620d23b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USYBL2200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932e502462e083077e9119320f2aeb2d0f85e83a281d84a161715686dc87c2c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USYBL2200789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42773eae80abc8766c235ca5166e508c47fa9e90bd34540804a4f11e03a625a4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USYBL2200790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8419cef23e0c75844a3e1504da03928171c717292dba11416f6c00e9dfbd966c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USYBL2200791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa01fb405551a1831b5e07886b13ff441ae60413cbd34dbefbba2db4df2fd5e7. 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/GBBKS2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8843ce3568df12b9581452fe13d9c803fb50d0f2570e3e5d956b326f4b8ea45. 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/GBBKS2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95165f01d0c791e228d54ade85638072bcaf41b7aea6a1dd5ef8dccc277ab1b4. 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/GBBKS2200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c36c044ced3251dcfbd2c1a595272f55e7a7c6d198aba3a9a7b38aefc8be0. 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/GBBKS2200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc546fafccef8c28bb482246a5a33a1f5f159e5c24c2834a0c663b862bf86b2d8. 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/GBBKS2200186.
I'll Remember For Me, I'll Remember For You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4e6a0e986bbeca9716f5f524598a07238575926d2abf15f869ef15e667f80. 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/GBBKS2200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081346d77bd35a3c4dc039e03e0efdd241de4a807be076b2bcce651b6a2e321e. 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/GBBKS2200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8a1b9ee011e98506fd3df850733b341b0ee829b96f8134e4e114c94e67f37d. 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/GBBKS2200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ecad65393207c8b73bb256c1d460fafcc046270efae724823d5d1d47cd1aa9. 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/GBBKS2200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa3652b04deef5c8dd3bc2afe20566232ad381abbe9cfddacac4be8135001c. 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/GBBKS2200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab62a63043d76705aacf8902fcc186368778e77cf848b5d29ca2db3cf4c997. 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/GBBKS2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77344ff7996995ce4c88cfea87f130ad2f1ec84d9b84a8c71c87463e983c089. 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/GBBKS2200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ac1928769a5b784301098f19255155347edc92ad21bed74b56b02e0f60a7f. 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/GBBKS2200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d201e5f177886fa9351f111821ac3e7ef2459abc988e696861d582cc2813f9. 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/NLZ8C2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf565de4f7b72ceb872f29936ce8d3f92d1747b4ee5447df4bfe871bd3beb72e. 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/NLZ8C2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87902b5c204aafba1361e441b897c87f04e152abfc57452f2930656166ac39. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLZ8C2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02640be757c40ae55d564f4fb750e231f687afd0e742887e11c19eef44161bb. 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/NLZ8C2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db86b8b42d24a054eedfd60dc21e7b5cea1057644040194efc71cb4e631b65f. 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/NLZ8C2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8163f5047c303c7d0190fe9a40fe445a76109a1e23dd7aaebea6d93b90b6f9e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USYBL2200783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652ebd6d44d7ce7b7022b0553828526ad96cf33c35498be6ed7bfbb78c3bfd87. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USYBL2200786.