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 0xacf4c233aad37c169816734c2b2277ff8fb3e397c5d281a99754bbfa1c92f741. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c122e0a1-b49f-481e-95fc-6aa0c2ae5f7b.json and https://artists.proofprofile.net/proofs/artist/c122e0a1-b49f-481e-95fc-6aa0c2ae5f7b.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 0x2cc1c1c10f7144fb7f2eedafc2944e58d26def7e7d3648c9c879e31ed5722f65. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA71369642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7982c331d209525e1188e3d625e6096041a72df9e8675e2118701f3c1be10011. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:01Z), 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/QMDA61382193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4cf0c28edef6904c3905778eb18b837d14bc9aea263d034a2e585fa1e11964. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:38Z), 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/QMDA61382203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d512cfd48018741fc513b0d66660d981bf5c38a299e0a85580f23c1c733d6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFMG1434923.
Kids Sing - Favorite Songs for the Birthday Party
Kids Sing - Favorite Songs for the Car Ride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a245295c3987225f064622c8af600ea2417ad919c52042e43282a992244bd79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFME1455308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030b38b2479e86ac1a92ac5efac159a3e8aae267f89198cb4e1933b5c72097e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:58Z), 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/QMFME1455322.
35 Essential Classics for Kids: Travel Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc18de7f751835c6d3e848862f77d6d3541ca989b2759ef306234c33f922877. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:27Z), 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/QMFMG1474073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287d5744ed5c21d5b45dc2e9a0c5a285bcc7d626da12bc1eac0a61557a48ab70. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:07:57Z), 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/QMFMG1435086.
35 Essential Classics for Kids: Farm Songs
Kids Sing - Favorite Songs for the Slumber Party
50 of the Best and Most Adorable Kids Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03443f461367bbaf0c3d696d62f9dcb47a266367aef27fabc2a3ba88ef7fda4a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:11:42Z), 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/GBWUL2068301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62f81f45653b68961b8e0768abc908856bf5b0100815fb1adce80d4ab41ccb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2041705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f540edf8ae654067535c11cb28b6dcd135a185f270c1a5fabdf99115ec8022. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:23Z), 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/QZ5FN2071365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3c651d440c730b7a9318d2c4054b6923a1aafcefb4c017887dbd3074ddc45. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ5FN2071366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a38c33592899f1f7e9c7feb44b73a613007713c1ac592061218722ee7f6fbb. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:05:45Z), 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/QZ5FN2071373.
101 of The Greatest Classic and Modern Kids Songs, Vol. 1
101 of The Greatest Classic and Modern Kids Songs Vol, 3
101 of The Greatest Classic and Modern Kids Songs, Vol. 2