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 0xccda34e475a177a3ba4e2c6fc62492b54af3841be7ead83548e784e0a91f6087. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0b69872-3546-4297-87d0-cdb230e7db2d.json and https://artists.proofprofile.net/proofs/artist/b0b69872-3546-4297-87d0-cdb230e7db2d.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 0x28d8835942c0a7ce636ae71fe979e8c2918c46a247efa7c1f5fc6e0d41a995aa. 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/NOPQN2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1ddfb648de8afe123a3b43c68e5cfdd0b5ca383731087d6a4388bf9529440. 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/NOPQN2201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf37a7446ec784078df23df22b2f3176d6935a563dc3f3148f04f17ce55a367c. 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/NOPQN1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd4b77f245dc444710734dade7693055097e9f49f7bf546bd9d415b47d8e38. 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/NOPQN1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8cc72edf80b96e6e065f1602c77778b01ebc89b5fe8a2de191aaea6e9f7d87. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN1902030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d5d7fbac20d1e82da5ea2efee3a80e3090cef1ce27a7d176567fcfda0a4da4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN1902040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ee972546360ec5ca59dca4f64c63645198062a8b206461bf9b3ff73ac9db40. 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/NOPQN1602020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530e725d836b9992fc9b4f0c0f030534d31854eb2f12e4bffea44a313c56d8f. 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/NOPQN1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0fa7bed7ca02c3036a7a110e191ce27cbce6528a1cdcfc8bdbc8e0166a7a3c. 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/NOPQN1603010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b3414e6549edff6d1043068fb569a5f7a61a6add487520ca60f2e7f3efabb8. 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/NOPQN1603020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4379eec09b37218b985f7ed9fb08c9f547c81b120765fa416b9255c7f7d2269. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NOPQN1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1869f17b381339401bb6fe2b05c4f95bca9844337a2e1b7405c304e4714d36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN1603050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78bba49cfdfebcf98302394b3aca897a2914a56820b855ae02b1b12a6461e72. 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/NOCEM1372010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd94f4f4dca398cefad9a9ad171e6dd677dcb1c4d91dacf87f50fb9709f7136. 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/NOCEM1372020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0764af8b3916aa7de77956f994c6bd769024b46c2dd82fc9f5350a468d92068b. 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/NOCEM1372030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990074ebc33d3254e07bc5b86ccebdfcdd761e2858008a297ed732af5ec12160. 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/NOCEM1372060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417cab1d21f1b6ec7ed35d450c03a2c3a333d2e30f7f9721e41b19528f18742. 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/NOFKF9803020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918f9fb759e0d30aafdc486580dc9b61bc05dce82b9bf6d146dec2066516406. 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/NOFKF9803030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114019b27f9142d12f6f93e6d33b0bcc9dda2d4c13157f68d02344f24e450642. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOGTA0040010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3021f1a4bc7fcaee9814e9e4eb53eb557fa0835e6086736f12b383f691ef687c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOFKF9803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417cab1d21f1b6ec7ed35d450c03a2c3a333d2e30f7f9721e41b19528f18742. 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/NOFKF9803020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918f9fb759e0d30aafdc486580dc9b61bc05dce82b9bf6d146dec2066516406. 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/NOFKF9803030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e875f6f8b539f039b82037b8b85c138130af6abfc9ee1a40baa1837a7cd83. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/NOFKF9803050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da716ef1c60ffb1d5f0127bf357cdb2acd849574cf6bb0822849127f999511c. 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/NOFKF9803090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfc5b5abb7a10ca5ebec7369860f797ea88631e562fb026b4daff19f22d9a69. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOFKF9602040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b5339df08575a03aeb43e0c69a019e079b57f7478c0c7d13db445db9d3d61. 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/NOFKF9602080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe047cf1d26794434632f8512c8724a39bd0e57188386ca2af3210f2321f74cea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd4b77f245dc444710734dade7693055097e9f49f7bf546bd9d415b47d8e38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf37a7446ec784078df23df22b2f3176d6935a563dc3f3148f04f17ce55a367c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOPQN1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530e725d836b9992fc9b4f0c0f030534d31854eb2f12e4bffea44a313c56d8f. 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/NOPQN1601010.