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 0x10ae765da55579be946252130bd14a78b96819ec965ca9ed4e25643541d44b3d. 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/393b6fbc-d08a-47ef-adbc-0c3af46fa57f.json and https://artists.proofprofile.net/proofs/artist/393b6fbc-d08a-47ef-adbc-0c3af46fa57f.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 0x4681757e5549f9d7962de1c0d3641131df7ef0e146aa2f8c3bfba31cf3566a37. 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/QZDQH2380842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd131f672b20bdaae8aa3a966fbbb8192e019954c118fb4636b03484f1a9db959. 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/QZDQH2380843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46645698cb8902ca1a8494c01eed933f7d8238d149bca53f913d3cc524e9e7a. 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/QZDQH2380844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3897090e0bf559a57cf3e5a6973317ca7fd845be6a3fcfb76a9e36cb482eefe2. 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/QZDQH2380845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c5db9b8327f7c1734853c1b61b9e53dc47945877f2c80099fc1dc600ce78e. 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/QZDQH2380846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5258e9738ac0dcbdd0477194bbc604d3b41ab6ddf76aa6e8283d451a712503d6. 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/QZDQH2380847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea0db4f82797821eb5a066e67e96ddbf8a991198c34510b0a45eb95689dbf54. 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/QZDQH2380848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72022182cc74348a3afca1794b553a94f63eb85613c9138923a7fe1bcaa25fd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDQH2380849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dd00d590e1a77623edb08d46d58f833777379d0fdd231c5130a4e10fa9962c. 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/QZDQH2380850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d6142f67274f7ae802551574643dd3942293c1a1d2beb18ca480825c3480a5. 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/QZDQH2380851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29325c25fe3a183d091b90b552fcf82063f4b680b3efdf3a565f16a6996a8819. 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/MX4971528786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8fa558dc0d4c6485ac934c447f0bd8bff4cb34f2da36296479cef40d8cd27d. 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/MX4971528787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9832d6e2c1df06254eaad833b69350d72282e30080835991353dcb19120ad89. 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/MX4971528788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18956f8e7d9b7fade8f26cd927c99e0b0cead932a03b22935f6f6f4c98c24579. 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/MX4971528790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8806e0dc031a7f8f66d2ba4c30be082c7cd997677e3c66f8f5156f60b93550f3. 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/MX4971528791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba4b9e62599ec7a710668785ef9fcfdfeb9db045cee0073907fc0ac6490eeb9. 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/MX4971528793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4765318d672b38a17a369136b77027a25771621c151a3b2f131219dfc54e2a. 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/MX4971528795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb4e690d6f50ea4a0da2f396c4939606ceee35236a2054f7d4924b560d48e4d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/MX4971528789.
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 0xb67802b9785d8f2e4815932260bddb49725c075f9e7ee241bb0b70a60718cd51. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/MX4971528792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c8bb86e20bca7675144605be8d9da091f832331661f9705adcf17f66fab40. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/MX4971528794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaffaba259aa8e0057e844de4057c21dc167e6e207b31a9d6d6c3f9d3ae0a1c0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MX4971528796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5734a77186fba361cfb3dfec99364b09dddd8c230672301089431f2402e86ac0. 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/MX4971505820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f82650c94533cec02d8d549935c0295899bec9908da221167a4d5a531de902. 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/MX4971505821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a139255ae4f0f85384b6984433f96f8b87c47df9276177b6fd70f57a08c9fe. 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/MX4971505822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a106a83c710155c1f251b8646e7663072fc7804878bd45faef86bc215c2cb. 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/MX4971505823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba21c46059b61ac00b53ba9d3efc8376bbc7eac64ceaa21b257dbd71d84d01. 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/MX4971505824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b86e684c60a257e7667c2f418b1077c2fdf94345df748825245180269ae208. 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/MX4971505825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e08a36ded7bac9b5f986a8a9af65006d3ae95d0b4f436fb2cc6f4e3df5d92d. 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/MX4971505826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f64e393d23d52adff951ea5f6887b6963cedb4c728bebb92c108fcd3d716be. 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/MX4971505827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f04cb448f8c811ddb2e5380e72290dfce31baf97031780f29df8882d1cafcc. 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/MX4971505828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e51f583dab86ea106b91f966c5c1cbccff90fde878ede423cd5b695974726d. 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/MX4971505829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a21ea0783709d082e297fb3da74dadcbdff15c4a1414ab37e597bab41bc7518. 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/MX4971505830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf67d0bd179f9c4d17c03906fca2682fc7f903c3f4309954fc6114f36c9bfd19. 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/MX4971505831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bbb3fa1eb77627f53f1121d930c07212138a7b5f0015d50ff151a159b587fd. 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/GBSMU3182469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4321293394a811614108fdb7824c6ce22d8114b234e3ba3d4b02643f39cd7fe. 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/GBSMU3182470.